Get along to a place where you can see Flamsteed House. The time ball was started in 1833 to signal the time to ships and Londoners. Just before 1 PM, the ball rises to the top of the mast. On the stroke of 1 PM, it falls down. Greenwich is all about time, so this is an iconic thing to experience. Flamsteed house is at Blackheath Avenue, London SE10 8EJ, England. Afterwards, enjoy a free stroll through the park.