A terrific purveyor of natural history objects and curios.

This museum dedicated to an oft-overlooked support industry features a surprisingly moving brass diorama of a man being saved from a sinking car.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Perhaps the most spectacular grotto along the Algarve coastline.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

This millstone commemorates a gruesome tale that may have been the source of the city's name.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

Swedish skyscraper with a 90° twist.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

Hans Christian Andersen for the postmodern world.

This collection of 80 polarizing foods aims to challenge your subjective notions of repulsion.

Machinery left over from California's once thriving mercury industry now attracts artists and explorers.

Giant jewel-toned statues fill the grounds of this Cambodian Buddhist temple in California.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

One of the largest fleets of armored vehicles in the world, sitting out in the California desert.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

This abandoned motel doesn't welcome guests anymore, but decay and a creepy atmosphere still call it home.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

The oldest stone house in Paris was built by its most famous alchemist.

This massive library holds what was once the largest book collection in the world.

Notorious artist squat renovated into legal studios.

Abandoned railway line circling the city of Paris.