A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

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

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

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

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

One of few lasting examples of the brief octagon craze that developed into folly.

This ancient market is often referred to as the oldest shopping mall in the world.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

An artist's cute bronze subway sculptures belie his violent artistic past.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

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

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Over 50 whirling pools left behind from the glacial age.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

A living time capsule of the 1960s Richardson Bay water-front.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

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