Some of the last remaining relics of one of World War II's most important invasions.

Believed to be the oldest active college baseball field in America.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

This now-deactivated naval base defended the Florida coast for centuries.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

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

Dedicated to the "World's Luckiest Fishing Village."

A former hospital is now home to a pizza parlor and maybe a few ghosts.

Florida’s half-sized replica of the Vietnam Veterans Wall.

A local landmark with generations of spraypainted messages, and more being added each day.

Once the primary source of ice in this region during the mid-20th century.

The "worst battleship ever built" is enjoying a grand second act, submerged 30 feet in the Gulf of Mexico.

One of the oldest continuously operating amusement parks in the U.S. is an open-air museum of Art Deco and neon lights.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

The oldest living tree in Manhattan comes shrouded in sinister legend.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

Bowl in splendor, if you're lucky.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.