Legend says this sacred tree was a gift from goddess Athena.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A Bibliophile's Dream.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

The walls and streets of the ancient city are peppered with penises.

This small-town opera house has appeared much more in national culture and history than its charming setting might suggest.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A lush green oasis in the middle of Chicago.

Interactive modern and vintage submarine equipment, World War II relics, and submarine attire.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

Odd, decrepit fountain honors Chicago author who had mixed feelings about his hometown.

Huge abstract sculptures of the Puerto Rican Flag.

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

This awkward aquarium sculpture is one of the strangest statues in Chicago.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

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

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.