This shallow cave got its name from copious amount of human bones found inside.

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

This freshwater spring fills with 10,000 gallons of water per minute.

Watch the ships come in on Michigan's 210 ft. high observation deck in Sault Ste. Marie.

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

One of the largest crucifixes in the world stands 55 feet tall in a secluded, wooded area of northern Michigan.

In this quiet park a rendition of a classic painting graces the outside of a charming restroom.

This is the last hand-cranked chain ferry of its kind in operation in the United States.

The remains of a religious colony, its amusement park, zoo, and baseball empire.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

What may be America's largest classic video game arcade lurks inconspicuously in a Chicago suburb.

Partially submerged Buddha heads freckle Chicago’s neighborhoods.

A beloved Chicago music venue offering cold beer and lots of “Friendly."

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

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

The ruins of a town wiped out by the second-largest earthquake in recorded history.

Clean, cold drinking water flows from a nondescript pipe in a roadside rock face.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.