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. Don’t just focus on what’s ahead – beneath your feet is Europe’s largest reservoir, while nearby, you’ll find the remains of a WWI anti-aircraft gun emplacement – two bonus additions to the splendid vista. Honor Oak, SE23. Honor Oak Park rail.