A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

Next to the Malaysian Prime Minister’s office stands this rose-colored mosque.

Two cannon-like cranes were installed on top of the bank building to fend off bad feng shui.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

This hulking behemoth is actually five interconnected towers built in the 1960s.

Monks turned this mountain into a temple by digging grottoes, tunnels, and a huge pagoda-like hall.

The world’s tallest outdoor lift stretches along the stone pillars that inspired the floating mountains in the movie “Avatar.”

This terrifying glass bridge on the side of a mountain cracks as you step on it.

China’s breathtaking futuristic library is lined floor to ceiling with fake books.

The world's first hotel built in an abandoned water-filled quarry.

Mirrored floors and arched shelves create the illusion of an infinite tunnel of books.

A fifth-century temple improbably built into the side of a cliff.

These layered sandstone mountains in China look like they are made of pressed crayons.

Intensely colorful calcite pools in Southern China.

In this desolate valley resides a gorgeous set of rocks sporting a technicolor design.

The world's largest concentrated solar power plant.

Designed as a labyrinth, this subterranean prison was crafted without bars or doors.

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

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

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

A space-age 1950s pavilion on a secluded path is full of Toronto history surprises.

The remains of a once-famous hotel that also acted as an artist colony.

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.