London's secret gardens open up for weekend
8 June 2013 Last updated at 04:02 BST
Gardens normally kept behind locked gates in London will be open to the public this weekend as part of the Open Garden Squares Weekend.
Some of the green spaces have not been seen publicly before, while others have been the backdrop to some historic moments.
BBC London's Wendy Hurrell spoke to Jenny Noon from PC Media and Dr Henry Oakeley from the Royal College of Physicians.