The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

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

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

Commemorating the spot where the famous scientist fed his pigeons.

Plans for this peninsula included houses, the United Nations Headquarters, and a nuclear power plant. When none of them worked out, it became an expansive park.

The last remaining attraction from Paragon Park.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

The world's largest rotating world.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

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

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

The world's largest piece of copyrighted artwork.

Second largest wastewater treatment plant in the country.

A disastrous shipwreck and a tragic love story.

The homestead of American patriot John Adams.

The only remaining place where you can play this century-old game for cash.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.