Natural sonic phenomenon comes with a grisly legend of murder and blood.

Erosion and time have created a naturally-formed water park.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

A tunnel of hardened lava along Maui’s famous Road to Hana.

A sculpture of a salmon swimming through a brick building.

A promotional sun clock on the site of San Francisco's great raceway.

Despite being burnt down multiple times, the ruins of this South Carolina church are still standing.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Home to the deepest rift anywhere on Earth.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

Massive crater in central Oregon.

Despite its name, this route in southern Utah offers a heavenly day trip.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

Nature's biggest mammal swims in landlocked Oklahoma.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Curious cave that stays a cool 56 degrees all year long.

The fifth-longest natural arch in the world, and the longest outside China.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The abandoned coal loading dock is a canvas for unsanctioned art.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.