One of the oldest colonial buildings still standing in South America.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

This stunning mass of ice spans 121 square miles and is still growing.

The world's largest piece of copyrighted artwork.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Memorial to a beloved puppeteer as well as all street performers.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

Eat first, shop later at this eatery within an Asian grocer.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

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

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

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

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

This historic graveyard monument is dedicated to a tragic victim of witch trial hysteria.

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

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

In Gloucester, Massachussets, fishermen celebrate a successful year at sea by charging a lubed pole to capture an Italian flag.

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

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.