This may look like a UFO crash site, but it was actually built by human hands as a conference center to commemorate several historic events that occurred on this mountaintop. It’s the site of the death of Hadzhi Dimitar, a Bulgarian revolutionary credited with the liberation of Bulgaria from the Ottomans. It was also the site of a World War II battle between partisans and fascist forces. Thirdly, it was where the Bulgarian Social Democratic Workers Party was founded in 1891, also known as Bulgaria’s communist party.
The site lay abandoned for many years and was a hugely popular destination for urban explorers, but now the government has decided to capitalize on its underground success and turn it into a proper tourism destination.
