Once the path of a railway tunnel, now home to thousands of glowing insects.

Occult books, tarot, oddities.

Australian Lake set aglow by Noctiluca Scintillans.

This impressive system of tanks was used to store drinking water as long as 2,000 years ago.

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

Feed it cash, get your very own gold bar.

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

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

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."

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

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.

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

Brawny guys rolling around in oil is the oldest regular sporting event besides the Olympics.

This former Imperial summer home was the venue for a royal slap that once echoed 'round the world.

The ancient latrines of the Greeks, in all their public glory.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

Large miniature theme park with 100-plus models.

Fantastic lake on the heart of a fault line.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

The ornate miniature mansions were built for Istanbul's feathered residents.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

Live a night as a Byzantine King, with a minibar and private jacuzzi.