I just recently got a bike and the weather (up until today) has been pretty lush and Springy, so I thought it was prime opportunity to get to know London better. There are some great canal routes around East London that windup and down from Walthamstow Marshes to Limehouse Wharf.
This is a really pleasant cruise and great reminder of the actual green spaces that do exist this manic metropolis. Further Northeast you go, the more pastoral it becomes. There are wooded areas, stables, and football fields. Now all I got to do is get myself a set of watercolours so I can break out some plein-air action.