Where you can photograph wild black bears without worrying about becoming dinner.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

The 320-year-old tree that greeted General Lafayette and rerouted an interstate highway.

This former asylum for Black Americans is haunted by its history of violence and racism.

An unusual sculpture, an interesting history, in a strange place, for a good cause.

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

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

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

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

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

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

An eerie, decaying ghost town destined to fade into the forest.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

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

One of the only memorials dedicated to journalists who died in combat.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

The land is home to swimming ponies and a legendary 18th-century treasure.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.