Cross this bridge and you will leave London. This is the point where London ends and Berkshire begins. 190 years ago there was a rickety wooden bridge here. Two horse-drawn coaches crashed into each other while crossing and the bridge was damaged. This was the main road from London to Windsor Castle so the King of England installed the iron bridge that you see today. And the bridge remains the property of the current king today. The river below is totally man-made and is used to divert water from the River Colne upstream to fill the ornamental ponds of Bushy Park and Hampton Court Palace twelve miles away. This is a large black circular cache. Please repalce so that is is not obvious to passers-by.
This cache is big enough to contain a trackable.