The Kew Gardens Street View Competition
To help celebrate the addition of Street View imagery, Kew Gardens are holding a competition to win free annual membership for two people to the gardens (and some other goodies). Kew have hidden two treasure chests within the grounds of the garden that can be found in Street View.
If you find the chests you need to send the link to Kew Gardens. There is also another clue that you will have to solve, which will be posted on the Kew Gardens' website later today.