The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

There has been an astronomical clock on this spot since the 14th century.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

A famed artist's inspiring work of peace and tolerance.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Christianity and Islam have clashed, yet here a Serbian Orthodox church and a mosque stand together.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

This extensive collection covers thousands of years of Polish military history.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

A striking public sculpture representing the period of martial law in Communist Poland.

The traditional Polish croissant, folded 81 times into the shape of a horseshoe, is a legally protected cultural treat.

A collection of old neon signs from all over Poland line a secluded courtyard.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

An underground city of salt.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

Flamboyant architecture from the turn of 20th century.