This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

A large camera obscura, constructed entirely from digitally fabricated components.

Thriving meadows span a rooftop in one of Brooklyn's most heavily industrialized neighborhoods.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

An eccentric playboy's astounding natural history collection.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

A snapshot of the city's fascinating voodoo culture.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

This backwater graveyard in the Hamptons became a trendy burial spot and posthumous status symbol for famous artists.

A graffiti Mecca welcoming artists from around the world.

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

"X" marks the spot of an echo chamber in the middle of a plaza.

This quirky curiosity shop takes its cues from the world's bazaars.

Reforestation in action is the main attraction in this abandoned quarry.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

The "original web site," this farm in Northern Vermont encourages orb-weaver spiders to build their daily webs, and then sells the preserved masterpieces.

A crumbling hospital from the 1850s on Roosevelt Island.