Hiking trail through Vrazji prolaz ('the Devil's passage'), Skrad, Gorski Kotar, Croatia. Vrazji prolaz is a deep, narrow canyon, at one point only around 2 metres wide, through which a hiking trail descends via a series of steps, bridges and walkways. Skrad lies in Croatia's mountainous Gorski Kotar region, near Risnjak National Park. © Rudolf Abraham