A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

Two dozen pinball games hidden away inside a most unlikely location.

The world's oldest continuously operating airport was founded by the Wright Brothers.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

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

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

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

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

Built by the patriotic residents of Boonsboro in a single day.

A Civil War Museum with some notable medical antiques.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

A priceless collection of the Nation's cryptologic history.

A museum dedicated to exhibiting remarkable outsider art.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

This beacon for pre-radar pilots once guided Charles Lindbergh to a safe touchdown in Tulsa.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

This museum dedicated to an oft-overlooked support industry features a surprisingly moving brass diorama of a man being saved from a sinking car.

This simple, broken column marks the final resting place of one of America's most famous explorers.

Giant papier mache hog sits on private property.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

The only diamond mine in the world where you can keep what you find.