One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

To find the "unicorns of the deep" you've got to go downstairs.

This unassuming city park is home to three different types of Native American mounds.

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

The empty tomb that houses the memories of Roy Bertelli's revenge.

Home of a 28-foot tall stalagmite known as the War Club.

The world's largest covered wagon is piloted by a giant Lincoln lawyer.

Today this bizarre rooftop phone booth seems like a piece of kitsch but it was once used to spot disastrous storms.

Abraham Lincoln's likeness rests at the top of this giant totem pole.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

A bizarre house filled with an astounding array of collections.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

An exhibit of items from the mental institution where Mary Todd Lincoln lived after her son conspired to have her committed.

A unique botanical garden housed in three giant geodesic domes.

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

Museum dedicated to the art of cutting and polishing stones.

The study has wall paneling from a 17th century ship.

An enormous park-like oasis, full of famous Chicagoans’ graves.