One of the oldest living oak trees in the Southeast.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

A historic landmark and museum filled with curious objects representing the history of Key West.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Deep into the lower floors of Pike Place, find a date with fowl fate.

One of the last of the great 1920s movie palaces is a Floridian Greco-Spanish-Persian dreamscape.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

A beautiful geyser under environmental threat.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This rustic old building is said to be the most photographed barn in America.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

This unique shop is full of memento mori art, antique medical equipment, secret society paraphernalia, and historical relics.

An impressive collection of dollhouses and an homage to the frog-leg canning industry.

Built to replace a house destroyed by a hurricane, this home is made entirely of shipping containers.

A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

When you can't get to the Pacific, just go to Florida.

A monument to the egos of two railroad magnates that fell into decline along with their careers.