An acoustic anomaly with a mysterious cause.

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

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

Beautiful scenery, history, science, and physics come together in this remnant of shipping lore.

Statue dedicated to the star of an old television show.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

This striking art museum holds an amazing series of curiosity cabinets.

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

An oil baron's wild paradise and the winner of an ill-fated air race.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.