A 12th-century fortress containing some of Berlin's oldest buildings.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Designed to resemble foreign architecture, this mosque-looking structure was used to pump water to a royal fountain.

This small train ride offers stellar views of the Grand Garden Palace.

Visitors may notice something strange walking through this quaint German town.

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

A guitar mounted on a wall in Temple Bar honors the Irish musician.

The world's first motorway was used as a racetrack until the late 1990s.

Recovered suit of a cannibalistic West African gang.

This 1st-century CE Roman bath sits under a carpark.

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

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

This restaurant combines two Finnish traditions in one place: warm-weather relaxation and outdoor carpet-cleaning.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

A public work of art that also provides some relief from the summer heat.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

The lesser-known Alice sculpture of Central Park dedicated to the “godmother of American children.”

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

There must be a pun in this haystack somewhere...

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.