The former hotel where Tesla invented the radio.

Nikola Tesla's former home contains an homage hidden from plain sight.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

A spooky defunct railroad tunnel now part of a sprawling trail.

One of the camera company's former manufacturing buildings is now a museum dedicated to its history.

See prehistoric footprints, plus two complete mastodon skeletons.

The first American department store, and home to the largest operating musical instrument in the world.

This rock formation above the Wabash River is part of an ancient coral reef.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

This iconic science fiction house still looks like something from the future.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

A section of a historic wooden trestle viaduct is preserved next to the railway line it once carried.

The warmth and creative kitsch of a quilt engulf every patron who visits.

This small archipelago in northern Lake Superior was formed by a massive meteorite impact 450 million years ago.

A relic of the region's once booming timber industry.

This amazingly preserved Gold Rush town is a historian's dream.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

See just what life was like in a 19th-century prospecting town.