Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The last bastion of Roman presence north of the Alps looms over a German town.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

Giant nude woman of Tijuana is also the artist's home.

A little sculpture with a large wardrobe.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

A man throwing a giant severed hand towers over Antwerp’s main square.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

A beer pipeline runs beneath Bruges.

Christ's blood allegedly preserved in a Belgian town.

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

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A floating cat sanctuary on an Amsterdam canal.

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.