the brilliant in the limestone cave in postojna

adelsberg adelsberger age ancient area attraction beautiful brillant brilliant calcite called cave caves deposited deposition depositions excavate excavates huge imposing imposingly impress impressively layers lime limestone limestones mattock mineral most nature nicely noteworthly old pivka postojna pronged railway reserve river road rogue sandstones sinter slovenia slovenian spectacle stalactite stalactites stalagmit stalagmite stalagmiten stone stones supersaturated system tourism tourist usually visitor water waters way