The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Dramatic river bend surrounds a natural red-rocked pedestal.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This historic tower in the California desert promises visitors a "vortex of good vibes".

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

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

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

One of the largest helium balloons in the U.S. is a 112-foot ginormous orange.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

One of the best collections of antique printing machinery in the world.

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

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

The beautiful 1920 Pantages Theatre remains hidden just underneath the LA Downtown Jewelry Exchange.

The legendary building that needed ghostly approval before being built.

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

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Sports history, made in the Arroyo Seco.

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

Thousands of turbines whir at at the origin of North American wind power.

An errant donkey ushered in a new era of mining in Nevada.

There's nothing creepier than a cemetery next to a clown motel.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."