Alexander Hamilton’s creation caused quite a bit of controversy.

While filling up your gas tank in eastern Kentucky, you just might stumble into this collection of country music memorabilia.

A lighthouse on this West Virginia lake started as a joke, then the forces of nature helped make it a reality.

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

Enormous lake at the bottom of a unique cave system.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The subtle science of a master molecular gastronomist.

A historic and oft-filmed prison stands in a Chicago suburb.

The longest navigable underground river in the United States is home to countless blind and albino animals.

Home to some of Indiana's last bison herds.

This quiet park's strange sedimentary spires were named after Kodak's color film.

A 220-foot deep watery drop-off, filled with marine life.

A sinkhole known simply as "The Hole."

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

If astronomy had a ghost, it would look like this observatory.

This bridge was constructed from the remains of the first Ferris wheel.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.