The third tallest lighthouse in America once guided author Stephen Crane to safety.

The ruins of a once-thriving sugarcane plantation that was burned in the Second Seminole War.

The island residents are known for taking their quirky sense of humor with them to the grave.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

A monument celebrating the idea of reaching inaccessible places.

A humid oasis combines recreation with exploration in a unique underwater cavern.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

The legend associated with these ruins understates the splendor of the mansion that once stood here.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

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

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

Home to a protest movement, a bombing, and a dramatic change in labor history.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

These pretty kitties killed and ate as many as 135 railway workers.

Years of archaeology, just chillin' by the water cooler.

All of Chicago's wood-paved streets are long gone but two alleys remain.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

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

The filming location of a shark attack in Steven Spielberg's famous shark movie.