A 100-foot metal tower and swinging bridge that provides stunning views of mountains in five states.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Legs Inn provides Polish food, a cornucopia of Native American artwork, wood carvings, and mounted deer heads.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Strange physical sensations and optical contradictions keep visitors coming back for more.

This massive solar system model is sprawled out across Maine's suburban wilderness.

A monument marks the beginning of the longest north-south road in the United States.

This candy-striped tower is the farthest east you can go in the United States.

The world's largest rotating world.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

A diorama of the Civil War, fought by cats.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

This jail which was in service for over a century is now open for curious visitors.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A rusted blade sticks out from the trunk of this tree, left as a memorial to a young man who left to fight in the Civil War but never returned home.

An aptly-named street near the birthplace of the modern LGBT rights movement.

The private island of Yale's elite Skull & Bones society is kind of a dump.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.