Cryptic messages embedded in the New York City sidewalk.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A semi-scholarly approach to sex.

Tucked in the back of this amazing antique store is an important piece of medical history.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

Grave of the man allegedly responsible for a series of infamous murders in Boston in the 1960s.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

One of the oldest living oak trees in the Southeast.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

The world's largest fire hydrant is supposedly tornado-proof.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

Outsider art meets paleontology at this roadside reptile repository.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

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

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.