This abandoned mine offers a glimpse at what life was like for those who came to Alaska seeking Gold Rush riches.

Colorful boxes placed over the dead are left to rot and crumble.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A crumbling hospital from the 1850s on Roosevelt Island.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Elevated freight railway turned wildly successful urban park.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Hoodoos, naturally eroded land formations, stand 20 feet tall in the Canadian badlands.

What was to be the world's most secure Cold War document vault ended up as just a few shallow caves.

The curios of pharmacist and collector Henry Wellcome.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

The first spinning jail built in the United States is the only one that still turns.

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

4,000 monkeys used for medical testing on an island off of South Carolina.