House of the Bulgarian Communist Party — Mount Buzludzha, Bulgaria

The Buzludzha monument or the ‘House-Monument of the Bulgarian Communist Party’ used to be a wonder back in the day. Opened in 1981, it served as a symbolic meeting point for the communist regime. But with the fall of the Soviet Union in less than a decade later it went into disrepair; now abandoned, this huge concrete building looks like an alien ship. The extreme location of this otherworldly monument, on Mount Buzludzha, puts it in the path of severe storms, ravaging winds and harsh winters. The outer windows were the first to go, escorted by the most of the metal-tiled roof, which is why the plans are being made to restore it.