The oldest continuously occupied public building in the United States.

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

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

This blowhole is supposedly caused by a trapped monster.

A giant "X" symbolizes the blood spilled from the brutal Juárez drug wars.

A 220-foot deep watery drop-off, filled with marine life.

A bovine sumo match in which both bulls live to fight another day.

A King Kong-like gorilla hangs from the top of this commercial building in Tokyo.

Not quite the menace it once was, this monster still has some chops.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

Built following the War of 1812, this fort has withstood hurricanes for centuries.

Electrical pylon in the shape of Disney's beloved mouse.

The museum chronicling a treasure hunter's dream, fulfilled.

A historic presidential getaway on the continental United States' southernmost island.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

The island residents are known for taking their quirky sense of humor with them to the grave.

"We Seceded Where Others Failed."

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

A perfect circle of 24 mysterious holes dates back to prehistoric times.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

A mysterious castle built as a monument to lost love.

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

Located in Faneuil Hall, the headquarters of the Ancient and Honorable Artillery Company of Massachusetts has stood the test of time.