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

This infamous prison has a store where you can buy goods crafted by incarcerated people.

Nursery with extensive collection of flesh-eating plants operated by the author of "The Savage Garden."

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

A historic train ride from California to Mexico.

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

This heritage museum highlights the importance of the dairy cow as a vital part of rural Maryland's past, present, and future.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

One of the last active volcanoes on the Eastern seaboard.

This historic mansion was built as a symbol of love between a husband and wife.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

A 100-foot metal tower and swinging bridge that provides stunning views of mountains in five states.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

The highest point in Virginia can only be reached by passing through ponies and flowers.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

The world's largest version of this iconic puzzle cube is located in Knoxville, Tennessee.

Railroad came. People came. Railroad left. Town died.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

This replica of the Greek structure is in the heart of Nashville.

More than five miles of underground passageways.

The secret city built by the Manhattan Project.