This vast masterpiece of Moroccan architecture spreads across 20 acres.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

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

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

One of the most spectacular canyons in the world.

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

Despite the name, these small saltwater swimming pools have nothing to do with the Romans.

This is one of the very few intact windmills built by the Knights of St. John in the island nation of Malta.

These temples are among the oldest free-standing stone buildings in the world.

These clocks tell time in a theological sense.

Spectacular secluded inlet with clear waters flanked by limestone cliffs.

Dynastic Home of the De Piro Family.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

This unique building in the main square stands out among the city's typically Baroque architecture.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

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

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

The prototype for all Nazi concentration camps.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

The memorial stands at the intersection of the rivers Morava and Danube.

Often mistaken as a medieval Gothic monument, this unique cornerstone only dates back to the 1980s.

A relic of the Cold War tucked away in the forested hills above Bratislava.

A line of disused military bunkers built to defend against Nazi invasion lies hidden on the outskirts of the city.

An ancient fortification lives on in this Chinese city.