Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

Georgetown’s most impressive building is also one of the tallest wooden churches in the world.

An alley covered with 20 years of bubble gum.

A deserted hodgepodge of experimental structures designed by nearby university students.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

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

A collection cataloguing one of the most brutal dictatorships in modern history.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.

The home of the Dead Sea Scrolls is an abstract modernist dream.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

The home of half the world's population of critically endangered mountain gorillas.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

The world’s largest work of glass art hides in this stunning Taiwanese subway station.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”