Hornborgasjön is a large lake in the Västergötland province of Sweden. It is located about 60 km west of the city of Gothenburg and is a popular tourist destination, especially for those interested in fishing and birdwatching. The lake is also known for its strange, otherworldly rock formations, which were created by the retreating ice age glaciers.

Byggnaden Doppingen ligger vid vid Naturum Hornborgasjön i Västra Götaland. Det innehåller café och samlingslokal för information om sjön och naturen. Doppingen invigdes 2018.

A crane flying over the southern outpost at lake Hornborga