The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

The crumbling structure is a rare surviving relic of the area's bygone mining industry.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

One man's ambition created this psychedelic log home.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The first declared National Monument in the United States.

A beautiful geyser under environmental threat.

The lasting remains of a historic spa.

This harrowing climb along West Virginia's jagged spires is one of the only Via Ferrata on America's east coast.

Winding country roads in eastern West Virginia lead to an extraordinary place populated by fiberglass giants.

This lookout tower built in the 1930s is now an in-demand cabin with what might be the best view of the Seneca State Forest.

This tiny man looms large over downtown Charleston.

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

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

The world's largest fully steerable radio telescope.

This abandoned train tunnel has been the subject of countless ghost stories for years.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.