A few iconic structures are all that remain of America’s first outdoor shopping mall.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

More than 5,000 contemporary and "historic" mustards from around the world.

This forgotten beach house built to look like a Frank Lloyd Wright masterpiece overlooks a hidden beach.

A strange rock in Chicago marks the spot where a tree once stood in honor of the 18th President.

One of the most well-preserved temples of ancient Egypt.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

A giant open-air sculpture made of over 200 full-sized boats.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

An 1870s ranch for pioneers, rodeo stars, and divorcees was abandoned and left for dead, until the city reopened it for exploration.

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

A famous hotel houses an impression collection of mini dioramas and giant doll houses.

Dioramas and animatronics lead you through the story of Bhagavad-gita, the Indian literary classic.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

A swamp that was the site of prehistoric water burials also managed to preserve its corpses for millennia.

A single artist is behind these large-scale models made of hundreds of thousands of two-inch wooden matchsticks.

360° views of the city plus five floors of optical illusions and hands-on science.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Where once there was a train station bathroom, there is now this German burger joint.

A surreal museum of extraordinary industrial objects.