I-95's Tijuana-style celebration of kitsch at the Carolina border.

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

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Each August, one of the largest religious (and food) celebrations in the country is held in Boston.

Narrowest house in Boston.

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

One of America's most historic homes also holds a startling literary legacy.

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

An eccentric inventor's castle home with its own indoor weather system.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Friction between grains of sand cause a curious "singing" sound.

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.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

One of only two remaining Victorian-era greenhouses in New York.

One-time largest man-made structure in the world will be a park in 30 years.

Waterway populated with abandoned projects, including a submarine.

A decommissioned military complex that's now a modern industrial park.

One of the largest public housing complexes in New York once visited by Eleanor Roosevelt.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

Ride the subways of yesteryear.