Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

God's Saharan sandbox of wrath.

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

This vast masterpiece of Moroccan architecture spreads across 20 acres.

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

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

Why trying to get lost in the old quarters of Essaouira may be harder than you think

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

These small, triangular, colorful houses are a staple of Madeira Island.

Besides being home to cave paintings and pre-Columbian Cuban archaeological remains, you get to take a boat through this stalactite and stalagmite covered cave.

Neo-cave art on the macro scale.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Ozymandias’ time-keeping temple.

These bronze sculptures sow whimsy by hamming it up on a pedestrian mall.

A former church transformed into a public library.

A chocolatier with a quaint museum showcasing the history of chocolate.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

An enormous illuminated figure dances on the Las Vegas strip.