A tiny cafe that recreates the Japanese elementary school lunch experience.

Go through the looking glass in Tokyo's Wonderland-themed shop.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

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

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

A gateway to a mysterious network of underground tunnels.

A tower devoted to — and modeled after — the Divine Comedy.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Avoid gangster interaction while window-shopping.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

One of only two commuter aerial tramways in the United States.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

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

Pilgrimage site for star-crossed lovers.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The prototype for all Nazi concentration camps.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A building so large that it has its own weather.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.