Omberg () is a forested mountain in the western

Östergötland County Östergötland County ( sv, Östergötlands län) is a county or ''län'' in southeastern Sweden. It has land borders with the counties of Kalmar to the southeast, Jönköping to the southwest, Örebro to the northwest, and Södermanland to the n ...

in Sweden. Administratively it is split between the municipalities of Ödeshög in the south and

Vadstena Vadstena () is a locality and the seat of Vadstena Municipality, Östergötland County, Sweden, with 5,613 inhabitants in 2010. From 1974 to 1979 Vadstena was administered as part of Motala Municipality. Despite its small population, Vadstena is ...

in the north. It lies between

Lake Vättern A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much larger ...

and Lake Tåkern. Geologically the mountain is a horst.

Alvastra Abbey Alvastra Abbey (''Alvastra klosterruin'') was a Cistercian monastery located at Alvastra in Östergötland, Sweden. History Alvastra monastery was founded in 1143 by French monks who belonged to the Cistercian Order. A number of monks and lay br ...

lies at its foot. The western cliff of Omberg has been indicated as an ''

ättestupa Ättestupa () is a name given to a number of precipices in Sweden, Norway and Iceland. The name supposedly denotes sites where ritual senicide took place during pagan Nordic prehistoric times, whereby elderly people threw themselves, or were thr ...

'' in folk history. Geologically Omberg is a horst, a fault-bounded and uplifted block of

bedrock In geology, bedrock is solid Rock (geology), rock that lies under loose material (regolith) within the crust (geology), crust of Earth or another terrestrial planet. Definition Bedrock is the solid rock that underlies looser surface mater ...

References

Nature reserves in Sweden Tourist attractions in Östergötland County Landforms of Östergötland County Mountains of Sweden Horsts (geology) {{Östergötland-geo-stub