If you want a peaceful day out of the busy city, Highgate doesn't really feel like London. The cemetery is interesting and peaceful, there's a tour of the old half which is definitely worth the money. Karl Marx, among others are buried there.

Home to hundreds of stray cats and dogs. 

Hands down my favourite pub in London. Go for the day.

THE place for birthday presents and bookcases (mine was 50p).

The Garden is nestled behind walls and positioned close to the River Thames in Chelsea. The Thames location is no accident as back in 1673 the Worshipful Society of Apothecaries chose their Chelsea village site for its proximity to the river to make the most of its warm air currents. It also gave them a base to moor their barge, allowing them to conduct plant finding expeditions in surrounding areas and to teach their apprentices to identify plants.