Hidden high on a remote mountain peak is a humbling and mysterious Vietnam War memorial.

Known as the "Hobbit Houses," these storybook homes look like they're straight out of the Shire.

The overgrown ruins of a once thriving World War I-era copper mine.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

A unique solar-powered pottery studio and gallery in the desert.

A lush indoor jungle fills this bustling Madrid transportation hub.

A tree that grows parallel to the ground was declared Brooklyn's "crowning curio" by the poet who saved it.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

A little stop along the Texas highway where Rock Hudson, Elizabeth Taylor, and James Dean stayed while shooting the 1955 film "Giant."

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

Gorgeous purple flowers drape from the world's largest blossoming plant.

A small sculpture garden that provides a microcosmic representation of California.

The legendary building that needed ghostly approval before being built.

One man's homage to the sun continues to grow like a glass fractal.

America's most famous piece of self-built architecture.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

You don't want to get caught in this trap--or do you?

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

Where the leftovers of love affairs can live on forever.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.