A historic covered bridge is but one example of an oddly prevalent American urban legend.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Yo, Adrian!

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Dr Barnes' $25 billion private collection of art and arboretum.

This elaborate towering structure was once famed for its revolutionary height.

This free, take-a-book shop seems like a trick but isn't.

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

A museum dedicated to exhibiting remarkable outsider art.

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

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

This blue behemoth of a bear is a colorful homage to Brown University's mascot.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

From the Difference Engine to the Cray-1, all under one roof.

The oldest house in the capital of Silicon Valley.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

A former hardware store near Yerba Buena is the official home of California's history.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.