Narrowest house in Boston.

The magic's in the hole!

The land is home to swimming ponies and a legendary 18th-century treasure.

A Wild West jailhouse that slid down the mountainside.

A spiritual vortex among the red rocks in Sedona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

Mexico's first public cable car soars over the congested streets outside Mexico City.

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

Frida Kahlo's childhood home, now a museum of her life and works.

A land of debatable treasure.

Temporary Burning Man sculpture made of two 18-wheelers.

This former Mormon settlement is reemerging from the receding waters of Lake Mead.

The most magnificent bottle house in a town strangely full of them.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

This small exhibition displays equipment and artifacts once belonging to the feared Stasi secret police.

This incredible stone temple is a monument to death, victory, and fantasy architecture.