Suffocating dogs was a common spectacle in the fumes of this noxious cave.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Ancient snack bar of the Roman Empire re-opened.

The walls and streets of the ancient city are peppered with penises.

A sulfuric hellscape in southern Italy.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

An extraordinary library and archive dedicated to the history of the Arctic and Antarctic poles.

The tiny airport in remote Newfoundland that inspired a hit musical is also a modernist architectural gem.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

These crumbling foundations are all that remain of the once-stately 1840s manor that gave the town of Bradenton its name.

Less a museum than a bizarre fantasy world created by artists and engineers.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

The history of the traveling carnival is remembered by this sprawling collection of vintage wagons, games, and rides.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

This fairytale-like structure is the last turf church ever constructed in Iceland.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.