The Yiyuan Rong Cave Group () is a cluster of

Ordovician The Ordovician ( ) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period million years ago (Mya) to the start of the Silurian Period Mya. T ...

limestone caves in the area under the administration of the city of

Zibo Zibo (, ) is a prefecture-level city in central Shandong province, China. It borders the provincial capital Jinan to the west, Tai'an to the southwest, Linyi to the south, Weifang to the east, Dongying to the northeast, and Binzhou to the ...

, Shandong Province, China. Rong Cave proper (, ) is the namesake of the cave group. It is located about to the north of the town of Tumen (). The cave group contains more than 40 caves in total and is the largest cluster of limestone caves in China north of the

Yangtze River The Yangtze or Yangzi ( or ; ) is the longest list of rivers of Asia, river in Asia, the list of rivers by length, third-longest in the world, and the longest in the world to flow entirely within one country. It rises at Jari Hill in th ...

. It covers an area of approximately 10 square kilometers.The Yiyuan Cave Group
/ref> Other major caves in the group are Thousand-Men Cave (), Resting Cave (), Stone-Dragon Cave (), Xuanyun Cave (), Nine-Skies Cave (), Coral Cave (), Lingzhi Cave (, after the

Lingzhi mushroom Lingzhi, ''Ganoderma lingzhi'', also known as reishi, is a polypore fungus ("bracket fungus") native to East Asia belonging to the genus ''Ganoderma''. Its reddish brown varnished kidney-shaped cap with bands and peripherally inserted stem giv ...

), Shenxian Cave (), and Xiaya Cave (, ). The Thousand-Men Cave was used as an arsenal by the Eighth Route Army from September 1938 to March 1939. Some of the major caves in the group have been made accessible to tourists as they are popular attractions.

References

Landforms of Shandong Tourist attractions in Shandong Caves of Shandong {{PRChina-geo-stub