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

European castle ruins in an American state park are actually the product of death and grief.

An antiquated German apothecary on Chicago's North Side.

An enormous park-like oasis, full of famous Chicagoans' graves.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

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

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Museum dedicated to awful artwork.

A Boeing mechanic and his wife leave a whimsical, stone sculptured garden as their legacy.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

Quite simply the largest tree in the world (by volume).

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Giant, pink stuffed rabbit on an Italian mountain.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.