The king of U.S. high points towers over every other peak on the continent.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

The most beautiful Taco Bell in the world even has surfboard parking.

The eccentric mansion of one of the most popular horror authors of modern times.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

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

One of only two commuter aerial tramways in the United States.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Ride the subways of yesteryear.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A museum dedicated to the history and exploration of both popular music and science fiction.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Elevated freight railway turned wildly successful urban park.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Oldest synagogue in the United States.

The last remaining attraction from Paragon Park.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

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

A grave surprise in the downtown area of New England's second-largest city.

This supermarket is suspended 25 feet above an interstate highway.

The world's largest piece of copyrighted artwork.