The world's largest piece of copyrighted artwork.

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

This beautiful architectural gem was the first waste treatment facility in Boston.

Impossibly life-like natural history models created out of glass by a father and son.

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

An enormous, inside-out glass globe built in 1935.

This impressive Boston holy house is the American mecca for Christian scientists.

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

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

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

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

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

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

A former major munitions plant that has been converted into a sprawling art space.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

At 207 feet, one of the world's longest continuous escalators.