Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

This neighborhood grocery houses a treasure trove of Eastern European delights.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

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

The Vermont grave of a 4,000-year-old mummy prince.

A tomb with a window to ensure the interred wasn't buried alive.

The grave of Mary Nasson is shrouded by witchy legends.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Yo, Adrian!

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

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

Bizarre Cavern.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

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

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

An outlandish shoe shaped house built by an eccentric millionaire.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

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

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

The trials and tribulations of marking Poe's grave.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

Ship skeletons haunt Baltimore's waterways.