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

California's own majestic geyser is powered by a subterranean volcano.

The Guinness Record holder for largest hedge in the world is a verdant Scottish bulwark.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

A miraculous natural phenomenon known as "the spring that breathes."

A rock outcropping left by a glacier that made itself useful throughout the centuries.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

A stray meteor left this picturesque hole in the Australian outback.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

San Francisco Bay's ghost town.

This former mining town was named the most toxic town in America.

A small flooded ghost town with a few scattered structures remaining.

Settled in 1696, abandoned after the Revolutionary War.

An Italian hillside ghost town.

Abandoned waterpark turned counter-culture mecca.

Haunted tuberculosis hospital built by the patients.

Small, privately owned island divided between Michigan and Ohio with abandoned vacation homes and a derelict lighthouse.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

A tiny islet just off Long Island offers a wealth of infectious curiosities.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

Infamous and now demolished panopticon prison built by its former inhabitants.

Relics of Australia's convict past, and a modern scene of unimaginable horror.