Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

"The Most Boring Road in the State."

Egyptian Revival obelisks still rise over the old mine shafts.

This missionary's legacy looms large over the Upper Peninsula of Michigan—literally.

An urban laboratory.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

There aren't too many operational funiculars around, but Pittsburgh has two!

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

Center filled with hands-on displays served as a tribute to several astronauts with connections to the state.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

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

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

Advice-columnist's bell tower, paid for with pennies.

Standing guard on top of an old, vacant ice cream shop.

Weighing 30,000 pounds, this monument represents Detroit's first industrial era.

A quarter-scale locomotive wonderland built by one man and his family.

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