This special clock changes with the season.

As the fall brings longer nights and shadows, expect some spooky fun with this Halloween treat. A surprising -- and sometimes scary! -- sound plays every quarter hour while a ghoulish gong rings in each hour.

The perfect clock for a Halloween party.

Have you herd this clock yet? It's udderly entertaining.

Moo!

Enjoy the majestic sounds of the world's most famous clock.

Located in London's iconic Elizabeth Tower, Big Ben was named after the clock tower's Great Bell that chimes the hour with its massive booming ring.