This stately clubhouse has showcased German-American culture for over a century.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

The home of the founder of American landscape architecture puts his principles into practice.

The grounds of former plantations where abolitionist Harriet Tubman spent her youth enslaved are now a museum to her incredible life.

This rudder is one of the few remnants of a shipyard that once operated on the banks of the Potomac River.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

America's first federal monument.

This steep slide at a kids’ playground went viral after an police officer tumbled down it.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

This landmark cemetery in Boston was created more than 300 years ago.

The site of Paul Revere's historic two lantern warning.

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

Harry Houdini plunged into the Charles River and performed one of his escape acts here in 1908.

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

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

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

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

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

One of America's most historic homes also holds a startling literary legacy.