Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

As its grandiose name implies, this wooden dome is unsurpassed in size.

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

World's largest Christmas store.

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

Large one-man sculpture park in Michigan.

A comedy troupe's collection of bizarre humor.

"The Most Boring Road in the State."

Egyptian Revival obelisks still rise over the old mine shafts.

The highest point in Wisconsin is capped by two towers that are not as mythic as Tolkien's but provide much better views.

The center of the only hemisphere that awards visitors with a commemorative coin.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.