An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

A grove of colossal man-made flowers built to collect the sun's rays.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

When ecosystems collide in the arid Southwest.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Millions of numbers carved in glass represent the tattoos forced upon victims.

The world's largest piece of copyrighted artwork.

This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

This impressive Boston holy house is the American mecca for Christian scientists.

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

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

The massive machine creates cracking displays of indoor lightning.

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

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

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

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

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

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

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

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

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

This nearly endless university hallway is home to a unique sunset known as "MIThenge."