This vast masterpiece of Moroccan architecture spreads across 20 acres.

This amazing oasis of art and plants is hidden on the outskirts of Marrakesh.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

The East Village tenement from the cover of Led Zeppelin’s 1975 album has a tea shop on the ground floor.

Established in 1937, the oldest candy shop in New York City boasts a rainbow-colored inventory that would make Willy Wonka envious.

New York City's only preserved family home from the 19th century.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

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

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

A terrific purveyor of natural history objects and curios.

Walk into an underground archeological dig, the site of the Roman Forum that was once the center of Valencia.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

One of the few remnants of an extensive tram network that once made Buenos Aires the “City of Trams.”

A bright little alley in La Boca is a part of tango history.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

The famous artist couple lived and worked here, in two different houses connected by a bridge.