A beer pipeline runs beneath Bruges.

A moving memorial to the fallen and missing from WWI trenches.

A forest outside Darmstadt becomes an open-air art gallery, where international artists turn trees, branches, stones, and clearings into strange, playful, and thought-provoking works.

A former Nazi lookout tower with a magnificent view of the Rhineland.

This stone in Lake Geneva was once the reference point used to determine altitude in Switzerland.

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

A plain wooden seat that once belonged to one of the most prominent figures of the Protestant Reformation.

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

The World Wide Web was created in this nondescript corridor at CERN.

Home of the Large Hadron Collider and the birthplace of the World Wide Web.

CERN's beautiful, bending sculpture is a tribute to the spread of knowledge.

Where two rivers meet—but don’t mix.

The Avenue of Mausolea is a series of grand palatial tombs.

Controversially restored in the 1970s, this giant 15th-century mosque is shrouded in legend.

Ancient barriers wrap around what was once an important stop along the Silk Road.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Where Stoddart and Connolly suffered in the infamous Bug Pit.

Touching displays of wishes for peace from the Cold War era.

Once a luxurious flagship of the Soviet Union, this Brutalist structure remains a landmark of Tashkent’s communist past.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

Prowl through this sprawling bazaar under a massive Soviet-era dome for delicious eats.

Giant cauldrons overflow with Uzbekistan's favorite rice dish at this cavernous dining hall.

Final palace complex of the last of 29 Kokand rulers.

Witness traditional silk production in the Uzbek city that's been a hub of sericulture for over a thousand years.