The UFO: The Buzludzha Monument is better known as "Bulgaria's UFO," for obvious reasons.
Iron Fists: Officially known as the House-Monument of the Bulgarian Communist Party, it lies on top of Mount Buzludzha. The peak's top was leveled by dynamite so that the foundations could be built. At the bottom of the hill two iron fists hold flaming torches.
The Approach: The walk up to the Buzludzha Monument is a foreboding experience.
Graffiti gate: Above the locked entrance, graffiti declaring "never forget your past" is a somber reminder of the Balkans' recent history.
'Enjoy Communism': The original Cyrillic letters are crumbling, but new slogans are being added all the time.
Balkan views: Panoramas from the top of the mountain stretch out for kilometers.
Way in: This is the first glimpse of the Buzludzha Monument's interior when crawling through the concrete hole through which intruders can gain access. Debris is scattered throughout the entire ruin.
Entering the hall: Steps lead up to an auditorium illuminated by light pouring through the broken roof.
Communist tributes: Mosaic images of Engels, Marx and Lenin watch over the hall.
Soviet symbols: The enormous hammer and sickle mosaic is in the center of the ceiling and has managed to stay intact since the monument's closure. The script around the edge declares the Soviet Union's state motto, "Workers of the world, unite!"
Solemn Hall: Walking through the great auditorium, officially named Solemn Hall, reveals the huge scale of the monument.
Outer rim: The outer rim offers excellent views over the region. It was once covered in mosaics of farming scenes, but due to exposure to the elements they've not lasted as long as the ones in Solemn Hall.
The auditorium: The ceiling has partially collapsed over the years, making it potentially dangerous to explore the interior.
"Lurkers of the world unite": The popular communist slogan was reworked in this graffiti, which has now become a famous piece of art inside the Buzludzha Monument.
Cracked rubies: This is all that remains of the red stars that once decorated the inside of the tower. Rumor has it that they were vandalized by looters in the belief that they contained rubies; they are in fact made of colored glass.
Rough exterior: The future of the Buzludzha Monument is unknown. Security guards have been monitoring the property in recent months, refusing access to those who try to break inside.