Every winter, this tiny islet on Florida’s Gulf Coast is swarmed by some of the largest birds on the continent.

See four top-secret US spy aircraft of the Cold War era, including the legendary SR-71 Blackbird and the A-12 Oxcart.

Measuring approximately 200 feet long, Swampy is the world's largest alligator-shaped building.

One of America's largest retail chains got its start in one of its most remote rural destinations.

A series of life-sized statues of each governor of the state of South Dakota.

Under the right conditions, rocks will move across this dry lakebed, leaving trails behind them.

Built around 1723, this is the oldest surviving home in the U.S.'s oldest colonial city.

Where Kevin Eastman and Peter Laird created their "heroes in a half shell" and founded Mirage Studios.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.

This site was a school and a center of Japanese-American life before internment.

Tour the oldest family-owned cigar-rolling factory in the country—then learn how to roll your own.

This sculpture is one of many stunning features along Tampa’s Riverwalk.

Restored historic buildings, machinery, and a Mediterranean garden tell the story of a vibrant multicultural neighborhood in the heart of Tampa.

This historic site situated in the Northwood shores neighborhood houses the remains of a forgotten town.

This shrine commemorates the site of the first known Catholic mass in the United States.

Approximately 65,000 gallons of crystal clear water pour out of this headspring every minute.

An Orlando museum houses the world’s most comprehensive collection of work by Louis Comfort Tiffany.

Constrained by time and topography, this civil engineering landmark was constructed 100 feet above Starrucca Creek over the course of a single year.

This 25-foot tall clock tower commemorates the start of one of America's foremost shopping districts and the end of the historic Palm Beach Pier.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

The head of a legendary lumberjack watches over a river in Maine.

The most photographed house in Maine looks good enough to eat.

Once the beating heart of a small Maine town, this old mill was revitalized in part thanks to a starring role in 'Jumanji.'

The timeworn "Yankee Stadium" of the fastest game in the world isn't going anywhere.