This historic fort spans more the 300 years.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Take a drunken tour inside the world's largest known geode.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

Deep scars on the earth left by the Ice Age.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

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

A Northwoods sporting competition that shows lumber jacks doing much more than cutting down trees.

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

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

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

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

The largest ski jump in the Western Hemisphere hasn't hosted skiers in decades.

143 feet of leaping muskie whose mouth can be used as a wedding venue.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

When waves crash onto this section of beach, the rocks sing a song.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

This friendly fellow was built to honor an advancement in mineral processing.

Half of a waterfall goes into the river while the other half seems to disappear.

Over 140 boathouses built by miners from the Soudan Iron Mine in the early 20th century overlook Stuntz Bay on Lake Vermilion.

Minnesota's oldest and deepest mine is now an underground physics laboratory.