A gift from Kyoto - a beautiful hidden Japanese garden in Holland Park 

A peaceful park in Kingston Upon Thames. You can see lovely houses and gardens across the river. It's a wonderful place where you can take a rest with your family or friends. I recommend you to take a walk after having lunch or dinner in riverside restaurants near to the park. It's not big, however, very enough to feel the beauty of nature. I've done some location drawings here which was quite exciting. Just seat on a bench and enjoy the comfortable atmosphere. 

Best spot for breakfast, lunch and people watching on Regent's Canal in East London.

A green oasis in Hackney, offering affordable, beautiful plants. A jungle full of inspiration. (Pic from meltingbutter.com)

A great place to start the day if you are in South London is Federation Coffee in Brixton Village. The food is great and so is the coffee. This is a very chilled place where you can get both and indoor and outdoor experience (even though the whole place is under the Village roof).