We've looked at some abandoned Bulgarian Socialist architecture before, but never like this. This winter, photographer Timothy Allen braved snowstorms and horrific cold to shoot the UFO-like Buzludzha monument in the Bulgarian Balkans. The resulting pictures look like the lost Communist equivalent of Echo Base. Allen traveled 250 kilometers outside of Sofia to get these incredible photos. The snow picked up during his shoot, and he even took a harrowing -25°C hang-gliding expedition to grab some aerial shots. Explains Allen of the building's history: Designed by architect Guéorguy Stoilov, more than 6000 workers were involved in its 7 year construction...