A historic coal mine that doubles as a museum and tourist attraction.

The highest point in Washington state is a volcano covered in glaciers.

Three hundred years of preserved Spanish colonial history in San Antonio.

A circus legend leaves an unexpected endowment.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

Largest man-made excavation on earth!

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Bad farming practices caused this unnatural natural wonder.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

This landmark cemetery in Boston was created more than 300 years ago.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This historic New Orleans cemetery is the final resting place of members of the Independent Order of Odd Fellows.

A monument celebrating the idea of reaching inaccessible places.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

Oldest building in California still in use.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

'Cause the fence start shaking, the earth was quaking.