The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The final resting place of New Orleans' most famous voodoo priestess.

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

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."

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

One of the tallest buildings in Africa provides a great view of Johannesburg's unique geography.

Mined to a depth of 240 meters with a perimeter of about 1.6 km, the largest hand-dug excavation in the world.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

An artist's cute bronze subway sculptures belie his violent artistic past.

Ride the subways of yesteryear.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

More gold than anywhere else, ever.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

A little sculpture with a large wardrobe.

This enormous censer uses a pulley system installed over 400 years ago.

The oldest Roman lighthouse still in use.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.