A volcanic crater that visitors can look inside.

This was once the center of the Birdman cult, and is now a World Heritage Site.

The ominously named cave is home to some remarkable ancient art.

The world's most remote airport.

The largest stone moai on Rapa Nui.

The most visited, and possibly most controversial, museum in Germany.

For centuries, Jeddah’s old town was a major trading port and a point of entry for Hajj pilgrims traveling by sea.

Beirut's thinnest building was the result of feuding brothers.

This modernist cinema has survived war and reconstruction to become a symbol of Lebanon’s revolutionary spirit.

Mummies preserved naturally for seven centuries.

Still standing despite its considerable slant, this tilted lighthouse has become a local symbol of resilience.

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

This 17th-century house was once the trading hub for two prominent Canadian fur barons.

This exuberantly curated landscape is one of the largest sculpture gardens in Canada.

A swirling spectrum of stained glass dazzles visitors who enter this subway station.

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

Its columns were all carved from the same white oak tree.

Immortalized in bronze, this frazzled student will be glued to his screen for centuries.

This mesmerizing kinetic sculpture blossoms endlessly in the breeze.

This hidden park hosts a rogue’s gallery of eccentric architectural obelisks.

Rome's first modern graffito is all that is left of a peaceful protest from the 1970s.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The mystic whose incorrupt corpse still attracts the faithful.