The world's largest secondhand book market is a haven for bibliophiles and bargain hunters.

An eclectic mix of influences rot together in harmony in this India necropolis.

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

Rock-cut cave complex filled with ancient Buddhist artwork.

Where giant ships go to die.

In Zanzibar, a historic 19th-century palace is a reminder of the world's shortest war.

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

Sitting atop a rock on Michamvi Pingwe beach, this restaurant becomes its own island at high tide.

These Nubian pyramids are strange and unique, even by pyramid standards.

Crumbling pyramids and temple ruins stand within the shadow of this sacred butte.

One of the largest sand dunes in the world is nicknamed the "Scary Mountain" due to its steep slope and sharp incline.

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

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

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.

These otherworldly formations were shaped over millions of years by the forces of nature.

No building in the world leans as far as the so-called “Leaning Tower of Abu Dhabi.”

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.

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

Feed it cash, get your very own gold bar.

Whitewashed mosque contains the world's largest carpet.

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

An abandoned desert hamlet swallowed up by sand.