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

Come for the speed, leave in love with the desert.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Home of a 28-foot tall stalagmite known as the War Club.

This university transit system is a 1970's vision of the future.

The world's largest fully steerable radio telescope.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

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

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

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

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

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

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

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

This frequently-photographed waterfall takes only a short hike to visit.

This working class sculpture pounds his hammer all the livelong day.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

The seamy, underground secrets of Portland's criminal past.

A walk through the historic city center, under the streets of Seattle.

This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.