This advertisement for talcum powder was painted on the rock face and has since defied removal.

The hidden ruins of a mill that is linked to an attempt to assassinate the vice president of the United States.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

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

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

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

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

The site of one of history's most indelible and horrific tragedies.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

Home to an eclectic collection of over 200 vintage motorcycles, Americana, and some of the most extraordinary antiques from all around the world.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

A daily replay of the experiment that proved the rotation of the Earth.

The only presidential monument to display a late POTUS's actual casket.

Inside this wonderland of weird, visitors are treated to a collection ranging from skeletons to haunted artifacts.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Yo, Adrian!

Huge masonic hall in Philadelphia with lavishly themed rooms.

A legendary boxing venue and ring featured in Rocky V.

The first neighborhood to implement the Garden City model in its suburban planning.

This huge work of functional public art replaced a landfill in New Jersey's Meadowlands.

If it feels like a speakeasy, that’s because it probably was one.

Local lore claims this park is named after a young woman who jumped off a cliff.