The tallest hotel in Europe.

Moscow's imposing monument to the Space Age.

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

Former headquarters of the KGB.

Its front wall is striped with a menagerie of fantastic beasts and magnificent monsters.

Museum celebrating the achievements of the Soviet space program.

Immortal combat in a Moscow museum.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

A small self-proclaimed micro-state located on a piece of disputed territory between Croatia and Serbia, near Liberland.

This 135-year-old weather station studied the effects of the climate on human health.

Just a few miles from Novalja, a strange geological oddity has left scientists baffled.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

A forgotten monument to Yugoslavian freedom.

A self-proclaimed libertarian micro-state on a tiny bit of disputed territory between Serbia and Croatia.

Now abandoned, the world's first torpedo factory is crumbling into the sea.

The only gulag ever to exist in socialist Yugoslavia.

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Humble beginnings for one of the world's most famous scientists.

This huge metal monument is slowly being stripped to its concrete skeleton.