Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

An extensive collection of ancient Egyptian artifacts and mummies.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

The unbelievably opulent home built for an infamous newspaperman.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Quite simply the largest tree in the world (by volume).

A hotel and restaurant serving as the mecca of kitsch.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

San Francisco's newly reopened hands-on science museum.

The ghostly remains of an accidental sea.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

A hand-built folk art installation covered with messages of God's love.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A huge musical instrument played by the ocean.

These markers are used to document elevation changes around the famed dam.

The arch that celebrated the completion of the Lincoln and Victory highways.

This beloved roadside attraction welcomes visitors with his signature neon smile.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

This historic national park is covered in the stunning ruins of red rock pueblos.