križna cave or krizna cave, slovenia / die höhle krizna jama - grahovo, slowenien / or križna jama, slovenija

adventure ancient art attraction background black cave cavern caves caving clip dark darkness deep design die drawing earth entrance formation geology glowing grahovo graphic ground hoehle hole jama krizna križna landscape light limestone mountain natural nature night oder outdoor outside picture rock scene scenery slovenia slovenija slowenien stalactite stalactites stalagmite stalagmites stone tourism tourist travel tunnel underground underworld water yellow