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

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

Pennsylvania's own Roswell-style UFO mystery.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

Ship skeletons haunt Baltimore's waterways.

A hidden alley in urban Baltimore is a haven for graffiti artists.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

This park contains a number of standing stones meant to heal and inspire.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

A rare view of a preserved Victorian science museum.

Mysterious rocks that ring musically when struck.

Where America's first doomsday cult awaited the end of the world.

The graffitied ruins stand hidden within the Pennsylvania woods.

Metal water storage tank turned ethereal concert hall.

There are eight natural springs around town, each with a slightly different taste.

One person's lost luggage is another person's treasure.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Locals call this magical moss-covered walkway the "Emerald Path."

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

The Home and murder site of the witch of Rehmeyers Hollow.