Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

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

This remote British Imperial telegraph relay outpost drove men insane.

Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

A pair of connected skyscrapers form this symbolic gateway.

Qatar's oldest market can trace its origins back more than a century.

The enormous diamond-shaped building packs a trove of academic and literary treasures into one futuristic space.

Feed it cash, get your very own gold bar.

This massive piece of artwork weighs more than 250 tons, and was designed as a tribute to the first president of the United Arab Emirates.

Isambard Kingdom Brunel, one of the great Victorian engineers, was the driving force behind the short-lived atmospheric railway.

Old Tudor home moved on thick iron rails to a new spot.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

A unique configuration of blown glass can be found inside this hotel lobby.

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

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

The cluster of igloo-like domes forms the remains of an ancient burial ground.

Microscopic scenes; some call it novelty, some call it art.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Macabre astrological automaton clock dating to the late 1400s.

Where commuters walk through remnants of an ancient Greek necropolis.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.