Dacian fortress of Căpâlna - Credit: Wikimedia Commons
Situated at the top of a steep hill, the Dacian fortress of Căpâlna was built in the second half of the 1st century BC as a military defense, guarding the entrance from the Sebeș Valley to the capital of the Dacian kingdom, Sarmizegetusa Regia. Read more on Wikipedia
Source: en.wikipedia.org