Predjama Castle, built in mouth of cave, near Postojna, Slovenia, Europe

architecture building built castle cave cliff color image copy space countryside day design environment europe forest growth heritage hidden hillside historical landmark horizontal landscape mouth of cave nature nobody outdoors photography postojna predjama castle protection remote scenic view slovenia travel travel destinations tree color colour culture daytime development eu eu european european union hill historical history isolation landmark motif negative space outside rural scenic seclusion security slovenian south east europe southern european structure view white space woods