This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

The "Gateway to the Arctic" connects Barrow's indigenous population with the sea and its traditional industry: whaling.

This mysterious and creepy location instills a strong sense of foreboding in all visitors.

The only museum and archive west of the Mississippi that is dedicated to the study of Abraham Lincoln.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

The location of the last stand of Charles Manson's doomsday cult.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

A crumbling hospital from the 1850s on Roosevelt Island.

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

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

Hidden amid a collection of trails is the site of a tragic crash.

The leathery remains of a woman who died in the 13th century now lie in a church named for her.

One of ancient Etruria's most spectacular archaeological sites with impressive necropolises and rugged landscape.

Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

Fans of the spicy bright-red sauce can tour where it's made.

Abandoned Air Force base that has fallen into disrepair.

The "Kill Bill Church" was transformed into a place of worship after a long Hollywood history.

“It's the quality” (but probably also the drive-through donut tunnel) that has attracted diners since 1968.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

An odd museum dedicated to French fakes.

A museum in a law office, filled with authentic and counterfeit goods.

One-of-a-kind museum inside the first Boeing 747-400 ever made.

This abandoned subway station can still be seen on regular commuter trips.