The collection of intricate sculptures includes one carved from a mammoth's tusk

This tiny garden was built specifically to provide a place of peace and serenity away from the busy city streets.

Its most enigmatic sculpture is a giantess with a ghostly face on her knee.

In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

A grand entrance to one of the world's smallest Chinatowns.

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

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

66,000 pieces of art, donated by one of the world's richest men.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

A fabulously bizarre surrealist sculpture by the late artist Leonora Carrington.

The only castle in North America to ever house European sovereigns.

An outdoor gallery of sculptures chiseled from a unique stone.

In the upscale neighborhood of Miraflores in Lima, a pretty little park is home to dozens of cats.

The little bear in the "funny kind of hat" has made his way from London back to Peru.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

A war-torn Olympic relic is being overtaken by graffiti and nature.

Bridge that died in war and was resurected.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.