Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An emerald-green grotto just a short trip from Austin.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

These fantastically named natural pools look like something out of a Scottish myth.

A bizarre house filled with an astounding array of collections.

A winding path built in secret on the edge of the continent.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

Stroll through a wonderland of stupendous moss-covered trees.

Home to items never before seen by the public.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

This woodland architectural installation acts as a camera obscura for the heavens.

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

A fifth-century temple improbably built into the side of a cliff.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This super-sized skillet is a replica of a usable giant pan where a woman once skated on bacon.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

This expansive bridge in the Canadian wilderness was originally just built for friends.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

The highest bridge in America was built for an almost unnervingly small amount of money.

Historic psychiatric asylum and most-filmed location in the Great White North.