activity black cycle-path cycling directions dutch footpath Forrest forrest-path fun groningen leisure nature outdoor outside sign signs vector walking white woods animals natural outdoors snails worms mushrooms plants insects butterfly outdoors forrest trees autumn fall HDR leaf leafs November Nyberg october sunny tree child creek green forrest hiking mother river rocks son walk water woman clear forest green lake light magic mirror pond spring sunlight swamp travel vacation wood architecture building chapel christian christianity church cold culture december Easter frozen ice old religion religious scenery scenic season snow structure sun tower winter wooden worship