Palace to Palace- unexpected London

Starting by the Cutty Sark we head towards Greenwich Park by the Maritime Museum and The Queen's House.  We climb up to the Royal Observatory and exit the park by the Ranger's House.  We go through Lewisham and follow the River Ravensbourne to Catford.  From there we head for Sydenham, New Beckenham and Peng to reach Crystal Palace Park on the Green Chain Walk.  Lots of sites of interest along the way.  Finish at Crystal Palace station.  Lunch stop TBC