This quirky hot springs town known to locals as "T or C" was named after a radio show.

This popular pilgrimage site offers a hole filled with holy healing dirt.

This is one really big nut.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A cave's rare beauty held a cavernous secret hidden underground.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum dedicated to the alleged Roswell Incident.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A simple plaque remembers a California island massacre that claimed more than 100 lives.

Built in 1895, this bed and breakfast was once a hospital that served an early 1900s Gold Rush boomtown.

The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

The echoes of a railroad town that solemnly mark the end of the line.

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.

Experience Larry Spring's self-taught "common sense" laws of physics.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

One of the only known surviving coconut palm trees in the entire state.

The beauty and the beast of hydraulic mining is on full display at this California Historic State Park.

Concrete strongholds stand guard over the Golden Gate.

This giant temperature attraction created some giant electric bills.

The remnants of a failed socialist commune can still be found just off a California highway.