The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

The vaguely man-shaped root that ate the body of the founder of Rhode Island.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

The world's longest known cave system.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

This two-room shotgun shack in Tupelo is the birthplace of a King.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

This small Key West museum is packed with dozens of artifacts that illustrate the life of the iconic playwright.

The highway's southernmost spot is a beloved local attraction.

A historic presidential getaway on the continental United States' southernmost island.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

"We Seceded Where Others Failed."

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

A building so large that it has its own weather.

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

An 18th-century Spanish watchtower made entirely of seashell and concrete.

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

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.