A scenic fort on the harbor protected Philadelphia from an attack that never came.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

Electronic inventions that resulted in products and systems we use every day are on display in this labor-of-love museum.

A remote horde of architectural treasures fit for Indiana Jones.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.