border descent exclamation red road sign steep triangle warn warning white girls gravel hiking hills Mountain Biking mountains nature sports steep descent architectural architecture background buildings carpark dangers fence fencing high high-rise highrise hill landscape light lighting modern panoramic parking river river-views riverside scenery scenic security shade shadow shadows shrubbery shrubs signs skyscrapers steep-descent sunlight surfaces trees vegetation vehicle views warning-sign water waterways ascent carriage carry cliff danger England english funicular Great Britain Hastings rails railway summer Sussex track transport ascend climb climbing descend distance downhill farm farmland grass livestock narrow rural sheep straight tarmac uphill view viewpoint