Civil War Fort on an island in the Boston Harbor.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Historic Hull Street was actually the first street with a proper name in the Boston area.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

A men’s restroom became a sandwich shop.

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

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

The site of Paul Revere's historic two lantern warning.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

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

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A collection of full-size movie monsters opened to the public.

The Boston square dedicated to the dark poet who was born nearby.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Two thousand artifacts from around the world collected by one woman who loved to travel.

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

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The hallucinogenic center of the ancient world.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

The walls and streets of the ancient city are peppered with penises.