A memorial dedicated to victims of the Irish Potato Famine who perished while quarantined on this island.

The site of the tragic isolation of Nipmuc Native Americans left to perish in King Philip's War.

Second largest wastewater treatment plant in the country.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The site of the climactic scene from the classic horror film is now a historic landmark.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

An anonymous art project beneath Longfellow Bridge where hundreds of trophies line the steel support beams.

The massive machine creates cracking displays of indoor lightning.

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

A tiny monument to the classic American candy.

Whimsical cookie-themed plaques mark the birthplace of the Fig Newton.

One man's psychedelic fence is painted with his cacophonous folk art musings on the world.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

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.

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

A unique columnar residence built in the 19th century.

A tiny town in an empty lot was the work of a local eight-year-old.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.