Four alabaster giants contemplate the tides on the shore of Denmark.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

This bike path was sunk below water level for maximum wonder.

An open-air sewer system that was covered piece-by-piece over 300 years.

The highest point in Belgium is a staircase to nowhere.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

A little sculpture with a large wardrobe.

This ghost town in Belgium will lose its street art when it ceases to exist.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

One of the world's tallest statues is also one of its most hated.

Some Moscow residents once claimed the bizarre, contorted mass of metal on top of the building was used to manipulate minds.

Moscow's imposing monument to the Space Age.

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

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

Former headquarters of the KGB.

Museum celebrating the achievements of the Soviet space program.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.