A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

A wax effigy of St. Valentine hides one of the saint's relics.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

A piece of John the Baptist in the American heartland.

A big museum full of little worlds.

Erosion and time have created a naturally-formed water park.

A mysterious drive-in nestled in the forest that leaves little to the imagination.

Beer lover's can-covered house.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

DIY collection of eclectic holdings.

A medieval castle in the middle of rural Texas.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

An emerald-green grotto just a short trip from Austin.

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

The 44,000-ton aircraft carrier was purposely sunk to create an artificial reef teeming with life.

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

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

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

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

Colorful curls of hand-blown glass form a captivating tower in San Antonio's Central Library.

This hidden sculpture garden full of Wild West art is one of San Antonio's best-kept secrets.