1. One Tree Hill
Almost certainly not the inspiration for the glossy US teen TV drama, One Tree Hill stands between Forest Hill and Brockley, and offers an unexpectedly breathtaking view of London to the north. Climb the steps to the summit and the cityscape is framed by hybrid black poplars and London plane trees. You’re standing above Europe’s largest underground reservoir, and there are the remains of a WWI anti-aircraft gun emplacement nearby, both of which add a frisson to the splendid vista. Honor Oak, SE23. Honor Oak Park rail.