An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

The Guardian of Tallinn.

This charming railway is one of the oldest and steepest funiculars in England.

This mesmerizing architectural wonder will take your breath away with its unusual color patterns.

The largest greenhouse in the world is home to over one million types of plants.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

Museum about life, death, and cannibalism in the Stone Age.

The longest hedge maze in the world.

Go deep down into the earth to experience the world of Welsh coal miners.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

This Russian locomotive museum was once devoted just to Lenin's funeral before expanding to encompass Moscow's entire train history.

Moscow's imposing monument to the Space Age.

Museum celebrating the achievements of the Soviet space program.

The tallest hotel in Europe.

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

Immortal combat in a Moscow museum.

World's largest bell sits on the grounds of the Kremlin in Moscow.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

These Stalin-era industrial 'death traps' hang lifeless above the city

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

Unusual building appears to be haphazardly built from randomly piled bricks.