The empty tomb that houses the memories of Roy Bertelli's revenge.

This historic hotel invented the chocolate brownie.

First planned industrial community in the United States.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

An overlooked memorial honoring the local Washington residents who died in World War I.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

These crumbling Latvian forts make for some haunting seaside ruins.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

Museum celebrating the history of computers, especially their role in codebreaking.

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

The house where the writer spent his formative years.

The modern birthplace of Irish freedom.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.