This old-world mansion with lush gardens is a gem in the heart of Silicon Valley.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

An expansive book store, art gallery, and curio shop with wares ranging from tarot cards to novelty socks.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

Inside this library, the history of Los Angeles is retold through a mural.

Historic funicular railway, believed to be the shortest railroad in the world.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

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

The legendary building that needed ghostly approval before being built.

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

This nonsensical smiling boat shuttles passengers between two places they could've easily walked between.

One incredible room in the Santa Barbara Courthouse is covered in wall-to-wall canvas murals.

This 15-story mural celebrates the 50th anniversary of the musician's iconic "At Folsom Prison" album.

I Street Bridge is the heaviest swinging center bridge in the United States.

The self-made house sculpture of an outsider artist who named himself "Chief Rolling Thunder."

Art blooms at this unique outdoor gallery along the banks of the Arkansas River.

Yup, that's where the name came from.

People of the Plum Bayou culture built these enormous mounds over 1,000 years ago.

A beautiful South Korean gate and garden in Little Rock honors American Taekwondo.

This lava formation earned its whimsical name from the log-like formation of it stones.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.

This massive metal sculpture in the shape of a folded paper airplane overlooks a Utah mountain.

The unusual patterns in this rock formation result from two distinct modes of weathering.