Pennsylvania's own Roswell-style UFO mystery.

A bronze statue of Mister Rogers in the neighborhood where he grew up.

This dramatic rail curve was once the target of a failed Nazi attack.

A full-service gas station known as the oldest in America.

Once home to a wealthy ironmaster, this 19th-century mansion now holds unique relics from Blair County's past, and perhaps the spirits of its former occupants.

Behold the rickety glory of one of the oldest roller coasters still standing.

The smallest covered bridge in Maryland.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

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

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

The "All-Seeing Eye of God" symbol on this library is a clue to one of the many former lives of this building.

True to its name, this little house presents like a dollhouse, and surprising details are revealed with a quick peek through the window.

A monument marks the location of the first successful steamboat demonstration.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

The scene of the largest surrender of Confederate troops at the end of the American Civil War.

Don't be surprised if you see a long-necked dinosaur peeking out from among the trees in Northgate Park.

Born from segregation and exclusion, Durham’s Black Wall Street is now a living reminder of the city’s past

This woodland architectural installation acts as a camera obscura for the heavens.

A curious art piece along a lovely biking trail marks several historic floods via a series of colorful poles that represent floodwater heights.

This fallen red oak tree has been transformed into a piece of trailside art.