Once America's tallest structure, now a Baltimore landmark.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones’ locker.

The whole world in one water tank.

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

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

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

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

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.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

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

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

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

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

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

An astounding collection of medical specimens, including bits of President Lincoln.

A museum dedicated to exhibiting remarkable outsider art.

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

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.