Bulgaria's Buzludzha Monument or popularly known as Bulgaria's UFO has been attracting explorers since the 90's. At present, this spaceship-like shrine is enclosed with original and new slogans, mosaic and graffiti.

Escalating from the top of the hill, this mystifying concrete Buzludzha Monument can be seen for miles, inspiring an uneasy excitement in those laying eyes on it for the first time. Above the valley from the top of its 70-meter-high tower is a red star wavering the symbol of communism. Buzludzha Monument is officially named as the House-Monument of the Bulgarian Communist Party or to some travelers, Bulgaria's UFO, reported Lonely Planet.

The trip to the Bulgaria's UFO passes by scenic farmland and countrified villages. There is no public transportation connecting this part of Bulgaria the only option to reach the place is by going out on your own. The Buzludzha Monument or Bulgaria's UFO is located in the middle of the Shipka Pass. According to CNN, it has served as a mute witness to a series of famous battles between Bulgarian rebels and the Ottoman Empire in 1868. On August 2, 1891, a group of men met at the summit to form the Bulgarian Social Democratic Workers' Party, which later became the Bulgarian Communist Party.

The Bulgaria's UFO opened to the public and used for official parties and events until the fall of the Soviet Union prompted its closure in 1989. The Bulgaria's UFO fell into a state of disrepair after few years without maintenance. At present, rising numbers of bold travelers make the pilgrimage to explore rotting Bulgaria's UFO. Daily Mail reports that the exterior is now vandalized with never forget your past and enjoy communism words smeared at the entrance. The interior of Bulgaria's UFO is spooky and sinister. Clutter and debris litter across the floor and every footstep echo off the decaying walls.

The circular room of Bulgaria's UFO is bordered by over 500 square meters of complex mosaics. The faces of famous Bulgarian politicians, as well as Engels, Marx, and Lenin, are witnesses hanged on the wall. The roof has been rapidly collapsing over the years, allowing rain, snow, and light to penetrate into the building.