A clock designed to run with perfect accuracy for 10,000 years.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

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

A serene plaza that commemorates one of the Granite State's most iconic figures.

The mosaic Star of David at the front of this store hints that it's no ordinary Italian grocer.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

Seriously good slices of Sicilian pizza lurk at the back of the Bronx's oldest enclosed market.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

The world's largest public collection of PEZ memorabilia.

More than 3,200 cookie jars line the walls and shelves of this little shop and over 1,000 salt and pepper shakers

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

These temples are among the oldest free-standing stone buildings in the world.

A single light illuminates one man's overshadowed contributions to street lamp history.

The attic and basement house two museums stuffed with oddities like swallowed spoon handles and a shrunken head.

This historic railway museum may have lost its passengers but not its love for trains.

One incredible room in the Santa Barbara Courthouse is covered in wall-to-wall canvas murals.

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.

One of the world's largest model railroads is a mind-boggling achievement.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

The floor of this spectacular Baroque sanctuary is covered in memento mori.