A mysterious stone embedded at the base of a historic Boston building.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

This giant Boston statue of Mary is standing on a globe to show her power over the universe.

Painstakingly built dioramas sit unnoticed in a Boston office building.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

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

The bears may be gone, but their old cages can still be found.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Giant heads occasionally litter the industrial Houston neighborhood where sculptor David Adickes has his studio.

This historical air terminal in Houston is slowly becoming an aviation museum dedicated to the city's aeronautical history.

An unrealized Taoist palace left abandoned in a Houston suburb.

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

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

These medicine cabinet staples are part of the museum's collection of everyday objects.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

An Irish Memorial commemorating those who perished due to potato blight.

One of the oldest of its kind.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

The first American department store, and home to the largest operating musical instrument in the world.

The oldest surviving botanic garden in the United States.