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

The largest falcon hospital in the world, caring for over 6,000 feathered patients every year.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

Whitewashed mosque contains the world's largest carpet.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

A faithful reproduction of Al-Jazari's enormous water clock.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

This little-known hero has been protecting "The Fens" for close to 400 years, and now from its most powerful challenger yet: climate change.

An engraved stone in a village church claims to be the grave of a minuscule folk legend.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

A much more welcome kind of snowbird vacationer, manatees camp out in these springs every winter.

An extraordinary "City of Caves" carved from solid stone.

A blooming house of worship for the masses.

Over the dunes of the Empty Quarter, the mysterious music of the desert.

This mysterious abandoned fort looks like something pulled right from Arabian legend.

This indoor ski resort has a mountain contained inside a mall.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

The opulent car collection of an eccentric Sheikh housed in his own private pyramid.

The world’s largest LED display, built over an F1 race circuit.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

Feed it cash, get your very own gold bar.

This elaborate temple was built around one of the Buddha's teeth.

An ancient stone fortress considered by many to be the eighth wonder of the world.