Old Warden Tunnel | Wildlife Trust for Beds, Cambs & NorthantsAn oasis of wildflowers and bird song with a wonderful view towards BedfordJust off the Greensand Ridge path, this reserve offers much interest if you venture 'off the beaten track'. As the path winds past mature hawthorn and blackthorn bushes, large ash and oak trees, it is hard to imagine that you are on top of a railway tunnel https://www.wildlifebcn.org/reserves/old-warden-tunnel