Elaborate tile work in this railway station tells the story of Portugal.

Building owners can take out tiles for free at this repository for historic building materials.

A collection of unique, and sometimes terrifying, handmade masks and costumes used for local festivals.

A deer-headed statue that brings together a 12th-century legend and big wave surfing.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

A unique seaside cave where Aleister Crowley faked his own death.

Legend has it the lovelorn tears of a princess and a shepherd boy formed the blue and green twin lakes in the Azores archipelago.

This abandoned five-star hotel is now a five-star urban exploration destination.

An iconic Soviet statue of working-class people.

This massive monument honors the first human in space.

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.

The tallest hotel in Europe.

Moscow's imposing monument to the Space Age.

Former headquarters of the KGB.

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

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

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

This historic system is the zero level benchmark for measuring the depths and altitudes of the Baltic.

Russia's own leaning tower was built on a tragic historical fable.

Replica of mosque destroyed by Russia in the 16th century.