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Cape Henry Light
The Cape Henry Lighthouses are a pair of lighthouses at Cape Henry, the landform marking the southern entrance to Chesapeake Bay in the U.S. state of Virginia. The location has long been important for the large amount of ocean-going shipping traffic for the harbors, its rivers, and shipping headed to ports on the bay. The original lighthouse was the first authorized by the U.S. government, dating from 1792. It was also the first federal construction project under the Constitution, for an original contract amount of $15,200 (an additional $2,500 was required to finish the lighthouse). A second lighthouse was built and completed in 1881 a short distance away after concern arose about the stability of the first. Both towers of the light station were designated a National Historic Landmark in 1970. History The first work of the new U.S. Federal government, the first Cape Henry lighthouse was built of Aquia and Rappahannock sandstone by John McComb Jr. and was completed in October, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virginia Beach, Virginia
Virginia Beach is an independent city located on the southeastern coast of the Commonwealth of Virginia in the United States. The population was 459,470 at the 2020 census. Although mostly suburban in character, it is the most populous city in Virginia, fifth-most populous city in the Mid-Atlantic, ninth-most populous city in the Southeast and the 42nd-most populous city in the U.S. Located on the Atlantic Ocean at the mouth of the Chesapeake Bay, Virginia Beach is the largest city in the Hampton Roads metropolitan area. This area, known as "America's First Region", also includes the independent cities of Chesapeake, Hampton, Newport News, Norfolk, Portsmouth, and Suffolk, as well as other smaller cities, counties, and towns of Hampton Roads. Virginia Beach is a resort city with miles of beaches and hundreds of hotels, motels, and restaurants along its oceanfront. Every year the city hosts the East Coast Surfing Championships as well as the North American Sand Soccer C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresnel Lens
A Fresnel lens ( ; ; or ) is a type of composite compact lens developed by the French physicist Augustin-Jean Fresnel (1788–1827) for use in lighthouses. It has been called "the invention that saved a million ships." The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. The simpler dioptric (purely refractive) form of the lens was first proposed by Count Buffon and independently reinvented by Fresnel. The '' catadioptric'' form of the lens, entirely invented by Fresnel, has outer elements that use total internal reflection as well as refraction; it can capture more oblique light from a light source and add it to the beam of a lighthouse, making the light visible from greater distances. Description The Fresnel lens redu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buildings And Structures In Virginia Beach, Virginia
A building, or edifice, is an enclosed structure with a roof and walls standing more or less permanently in one place, such as a house or factory (although there's also portable buildings). Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for a wide number of factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and aesthetic reasons. To better understand the term ''building'' compare the list of nonbuilding structures. Buildings serve several societal needs – primarily as shelter from weather, security, living space, privacy, to store belongings, and to comfortably live and work. A building as a shelter represents a physical division of the human habitat (a place of comfort and safety) and the ''outside'' (a place that at times may be harsh and harmful). Ever since the first cave paintings, buildings have also become objects or canvasses of much artis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octagonal Buildings In The United States
In geometry, an octagon (from the Greek ὀκτάγωνον ''oktágōnon'', "eight angles") is an eight-sided polygon or 8-gon. A '' regular octagon'' has Schläfli symbol and can also be constructed as a quasiregular truncated square, t, which alternates two types of edges. A truncated octagon, t is a hexadecagon, . A 3D analog of the octagon can be the rhombicuboctahedron with the triangular faces on it like the replaced edges, if one considers the octagon to be a truncated square. Properties of the general octagon The sum of all the internal angles of any octagon is 1080°. As with all polygons, the external angles total 360°. If squares are constructed all internally or all externally on the sides of an octagon, then the midpoints of the segments connecting the centers of opposite squares form a quadrilateral that is both equidiagonal and orthodiagonal (that is, whose diagonals are equal in length and at right angles to each other).Dao Thanh Oai (2015), "Equilateral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Historic Landmarks In Virginia
This is a list of National Historic Landmarks in Virginia. There are currently 123 National Historic Landmarks (NHLs), and 2 former NHLs. Current landmarks The National Historic Landmarks (NHLs) are widely distributed across Virginia's 95 counties and 39 independent cities. Former National Historic Landmarks See also * National Register of Historic Places listings in Virginia * United States National Park Service areas in Virginia * List of National Historic Landmarks by state References External links {{Virginia Historic sites in Virginia National Historic Landmarks Virginia National Historic Landmarks A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500 (~3%) of over 90,000 pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouses On The National Register Of Historic Places In Virginia
A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lenses and to serve as a beacon for navigational aid, for maritime pilots at sea or on inland waterways. Lighthouses mark dangerous coastlines, hazardous shoals, reefs, rocks, and safe entries to harbors; they also assist in aerial navigation. Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and has become uneconomical since the advent of much cheaper, more sophisticated and effective electronic navigational systems. History Ancient lighthouses Before the development of clearly defined ports, mariners were guided by fires built on hilltops. Since elevating the fire would improve the visibility, placing the fire on a platform became a practice that led to the development of the lighthouse. In antiquity, the lighthouse functioned more as an entrance marker to ports than as a warning signal for reefs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places Listings In Virginia Beach, Virginia
__NOTOC__ This is a list of the National Register of Historic Places listings in Virginia Beach, Virginia. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in the independent city An independent city or independent town is a city or town that does not form part of another general-purpose local government entity (such as a province). Historical precursors In the Holy Roman Empire, and to a degree in its successor states ... of Virginia Beach, Virginia, Virginia Beach, Virginia, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in an online map. There are 32 properties and districts listed on the National Register in the city, including 2 National Historic Landmarks. Another property was once listed but has been removed. Current listings Former listing See also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of National Historic Landmarks In Virginia
This is a list of National Historic Landmarks in Virginia. There are currently 123 National Historic Landmarks (NHLs), and 2 former NHLs. Current landmarks The National Historic Landmarks (NHLs) are widely distributed across Virginia's 95 counties and 39 independent cities. Former National Historic Landmarks See also * National Register of Historic Places listings in Virginia * United States National Park Service areas in Virginia * List of National Historic Landmarks by state References External links {{Virginia Historic sites in Virginia National Historic Landmarks Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth are ... National ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boston Light
Boston Light is a lighthouse located on Little Brewster Island in outer Boston Harbor, Massachusetts. The first lighthouse to be built on the site dates back to 1716, and was the first lighthouse to be built in what is now the United States. The current lighthouse dates from 1783, is the second oldest working lighthouse in the United States (after Sandy Hook Lighthouse in New Jersey), and is the only lighthouse to still be actively staffed by the United States Coast Guard, being automated in 1998 though there is still a keeper acting as tour guide. The structure was designated a National Historic Landmark in 1964. History The first keeper of Boston Light was George Worthylake, who drowned, along with his wife and daughter, when returning to the island in 1718. During the American Revolution, the original lighthouse was held by British forces and was attacked and burnt on two occasions by American forces. As the British forces withdrew in 1776, they blew up the tower and comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
First Landing State Park
First Landing State Park (formerly Seashore State Park) offers recreational opportunities at Cape Henry in the independent city of Virginia Beach, Virginia. As the first planned state park of Virginia, First Landing is listed on the National Register of Historic Places as Seashore State Park Historic District. A portion of the park is listed as a National Natural Landmark as part of the Seashore Natural Area. The state park is near the site of the first landing on April 26, 1607 of Christopher Newport and the Virginia Company colonists before establishing themselves at Jamestown. The park includes cabins, areas for camping, fishing, and swimming, a public beach, and over of trails for hiking and biking. Virginia's most popular state park, it's visited by over a million people each year. Its main entrance is located on Shore Drive across from the beach camping entrance. First Landing State Park charges a fee for its camping facilities and for the overnight use of its cabins. O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Henry Memorial
The Cape Henry Memorial commemorates the first landfall at Cape Henry, in Virginia Beach, Virginia, of colonists bound for the Jamestown settlement. After landing on April 26, 1607, they explored the area, named the cape, and set up a cross before proceeding up the James River. A stone cross, set up in 1935 by the Daughters of the American Colonists, stands in the quarter-acre site. The memorial marks the First Landing, the very beginning of what would become British North America and subsequently Anglo Canada and the United States of America. The Memorial also overlooks the scene of the Battle of the Virginia Capes, in which the French navy prevented the British from reinforcing General Cornwallis, and led to the Franco-American victory at Yorktown. A statue of Admiral Comte de Grasse and a granite memorial honor those who fought in the battle. Although not memorialized at the park, this was also the location of the earlier smaller naval Battle of Cape Henry in which Briti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Revo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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