A 16th-century horror show built in a lovely Italian garden.

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

Outsider art meets paleontology at this roadside reptile repository.

Prehistoric animals decorate this popular outdoor park.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

Staves, storm-calling, and of course, necropants.

Climb right into the heart of this colorful Iceland volcano.

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

A sulfuric martian landscape that looks far better than it smells.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

An aluminum skeleton brings Chinese mythology to the French shore.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A swing to dangle you off the very edge.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

A historic grist mill and active sluice on the Black River.

Fire meets ice at the southernmost volcano on Earth.

A glacier pocked with ice caves and surrounded by rainforests.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Medicinal spa created with the discharge from a geothermal energy plant.