A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

A castle perched precariously over the Crimean Sea.

The largest catacomb system in the world.

This attraction was abandoned after the Chernobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

The deepest metro station in the world.

The largest collection of death masks in Ukraine.

An Art Nouveau building covered in animal gargoyles and grotesques.

The eerie burnt-out remains of a prominent building where 30 protestors lost their lives.

340-foot statue built to honour the Heroes of the Soviet Union.

A symbolic graveyard for the villages that perished during the Nazi invasion of Belarus.

Glowing orb in Minsk houses 8,600,000 items.

A small museum in this border city displays the contraband art that has been stolen back from smugglers.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

The Guardian of Tallinn.

Flamboyant architecture from the turn of 20th century.

A black cat protests the City Guild in Riga's Old Town.

3,000 market stands in five former Zeppelin hangars.

This micro-nation may be some sort of prank, but its constitution sure seems official.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.