This classic red schoolhouse is said to have been where Mary and her little lamb went to school.

This replica of a historic fishing shack long dubbed the most painted building in America.

This mosaic commemorates the oldest subway tunnel and station in the United States.

Homemade rockets, dinosaurs, and robots make this New York small business much more than a furniture store.

The oldest continuously inhabited street in America.

A 19th-century blast furnace that played a big role in the area’s industrial development.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

These whimsical works of art tell the story of the city's past and present.

A 17th-century Japanese bell brought back by U.S. sailors after WWII and later gifted as a symbol of peace.

This statue intended for children to enjoy became a minor political spat.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

The infamous Boston Mob ran rackets from an office here in the 1970s.

Those belting out show tunes in this West Village piano bar might not realize it marks the site where Thomas Paine died in 1809.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

This sculpture is dedicated to a local therapy dog who later became the official mascot of the 126th Boston Marathon.

A monument to the winner of the 1946 Boston Marathon, Greek runner Stylianos Kyriakides.

This pavement line and accompanying statue commemorates the starting point for the world's oldest annual marathon.

This mysterious artificial cave has long puzzled New Englanders.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.