Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

This historic train station has been converted to a locomotive themed hotel.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

This kitschy tavern is also home to rare early editions of "Treasure Island."

More than five miles of underground passageways.

A morbid piece of memorabilia from the most famous shipwreck in current history is just one of the many poignant artifacts in this Canadian museum's collection.

The final resting place of 121 victims of the RMS Titanic, 42 of which may never be identified.

The city of Halifax still bears the scars of the largest explosion prior to the atomic bomb.

The restored ferry is now a dockside museum and a unique bed and breakfast.

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

World's largest Christmas store.

The park is home to the United States's only still-operating Dutch windmill.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

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.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

The history of the traveling carnival is remembered by this sprawling collection of vintage wagons, games, and rides.

Yo, Adrian!

A house of courtship where the Jazz Age's most storied lovers got their start.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.