Its eclectic exhibits range from the world’s first motorcycle to Luke Skywalker’s Land Speeder.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

Buy a token from the liquor store and you can make this beast spew flames on command.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

This mysterious hill seems to pull objects uphill.

Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

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.

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

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A medical facility that has been kept frozen in time.

Two dozen rescued bears roam (mostly) free at the largest bear ranch in the U.S.

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

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

Strange physical sensations and optical contradictions keep visitors coming back for more.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

A haunting army of decomposing, moss-covered stuffed animals and dolls guard this swinging truss.

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

The writing studio of an American adventure author, built in the style of a medieval castle.