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

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.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

The world's tallest palm trees look like the whimsical kind of plant you'd find in a Dr. Seuss story.

Towering high above the neighborhood of La Candelaria, the church is easily recognizable by its distinctive red-and-white striped facade.

A celebration of Colombia’s premier contemporary artist.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

Road signs in Namibia mark the location of one of the five major circles of latitude.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

A rare cluster of alien-like plants grows along a dusty highway.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

A 19th-century relic of timekeeping.

It celebrates the four men from South Africa who have won the Nobel Peace Prize.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

The Cape of Good Hope is not quite as low as you can go on the African continent, but it's still geographically significant.

This small island off Lambert's Bay is home to more than 2,000 Cape gannets and is the only such breeding colony open to the public.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

A fortified city, home to a remaining population of five families

One of the most spectacular canyons in the world.