Södertuna - Credit: Wikimedia Commons
Södertuna () is a medieval castle located on a small island in Lake Frösjön in Gnesta Municipality, Sweden. It dates to the 14th century and is now a luxury hotel and conference center.Södertuna The main building is of medieval origin, but was updated during the 17th century and the late 18th century. The last major renovation was in 1892. Read more on Wikipedia
Source: en.wikipedia.org