Dedicated to one of the darkest moments in Irish history, this memorial has faced its fair share of backlash.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

Narrowest house in Boston.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

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

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

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

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

Two thousand artifacts from around the world collected by one woman who loved to travel.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

The 25th President's marble casket can be visited in this classical Ohio tomb.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

This theater opened in 1998, but both the building and the puppeteers who perform there have a distinguished history.

A playground the size of a city block is a modernist monument to civic values and public housing.

New York City's only wildlife rehabilitation center treats more than 3,000 feathered and furry patients each year.

Walk over a 150 year old manhole.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

Walk in the footsteps of the famed astronaut at Purdue University.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

One of the largest public housing complexes in New York once visited by Eleanor Roosevelt.