A church of bones, decorated with 40,000 human skeletons.

A daily pyrotechnic celebration marks a beloved tradition during Valencia's festival season.

This supermarket is suspended 25 feet above an interstate highway.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

Museum dedicated to awful artwork.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

A unique columnar residence built in the 19th century.

An enormous, inside-out glass globe built in 1935.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

Ice cream stand, snack bar, and time capsule of milk conveyance.

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

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

Narrowest house in Boston.

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

A volcanic landmark located on an Ice age lake bed.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

These machines have been collecting dust for decades.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.