When you've got to go, you've got to go.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

An Art Nouveau building covered in animal gargoyles and grotesques.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

A massive marble foot is tucked away in a small alley near the Pantheon.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Hindu temple of the dead home to hundreds of long-tailed macaques.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

This tiny lake temple dedicated to a water goddess seems to float on the surface.

An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

France's most famous cemetery, with some of its most curious tombs.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A condom-covered Thai restaurant that is more concerned with birth control than food.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

This Bangkok high-rise looks like a rudimentary LEGO elephant.

This abandoned Brutalist treehouse is a hidden architectural relic.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

When this funny little building went up in the 19th century, most people thought it would simply fall over.

This building has a giant piercing through one of its corners.

Architectureal fantasy quarter of Rome.

This medieval city gate is now a blend of the past and the modern world.