Site of the greatest known waterfall that ever existed.

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

Shoreline strewn with the remains of ghostly fallen trees.

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

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

The alley connecting two of country music’s most historic venues has a rich history of its own.

This stone incorrectly marks the 35th parallel, causing some territorial kerfuffles.

The pan man stands as a testament to the functionality of American cast iron cookware.

This church houses the “incorrupt” body of its founding Bishop.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

In the hometown of the Grand Ole Opry star is a larger-than-life memorial statue made entirely from chicken wire.

An abandoned town is hidden in Great Smoky Mountains National Park.

These early tent-shaped grave coverings are unique to Appalachia.

A restored, one-room African-American schoolhouse in the diva's hometown now preserves the legacy of its most famous student.

The secret city built by the Manhattan Project.

Home of an evil witch famous within southern folklore.

A museum in the heart of Virginia peanut country devoted to the humble goober.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The FBI's urban training course may have the highest fake crime rate in the world.