This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

An ultra-modern vista that has been featured in so many films the house is a celebrity in its own right.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

Explore 10 acres of environmental sculptures.

An urban laboratory.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A Saint Nicholas-themed ghost town in the Mojave desert.

An homage to everyone's favorite prehistoric cartoon family.

A spiritual vortex among the red rocks in Sedona.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

A self-built castle made by a mysterious man.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A huge musical instrument played by the ocean.

A hidden oasis just two minutes from downtown Atlanta.

Secret gardens just a few miles from downtown Atlanta.

This "living building" on Georgia Tech's campus is home to a blueberry orchard, honeybees, and more than 900 solar panels.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

Located within a historic park, the beacon is the oldest standing structure in Miami.