A floating cat sanctuary on an Amsterdam canal.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A striking symbol of the Bulgarian capital.

This church houses the tomb—but not the remains—of St. Nicholas, the likely progenitor to Santa Claus.

Roman ruins, natural methane fires and a lovely beach.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A marvel of Byzantine engineering under the streets of Istanbul.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

Hundreds of Buddhas in a re-discovered Indonesian temple.

American bombs, morbid memorabilia, and graphic photographs tell the story of the CIA-led “Secret War” from the Pathet Lao perspective.

When the USA donated cement and funds to expand the airport in Laos, the Laotians built a massive monument instead.

The oldest known university in the world is in Fez, Morocco.

Traditional 11th-century outdoor tannery.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

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

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

The other side is actually green.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

One of the most spectacular canyons in the world.