natural archway at jenolan caves

access adventurous arch archway attractions australia australian cave cavern cavernous caves cavity chamber coach coachhouse craybacks deserted destination devils discover discovered empty environment experience exploration explore footpath footway formation geological hall heritage hike house inside jenolan lead leading limestone national natural nature nettle old open openended park pass passage passageway passing path reserve rock rocky route solitary stones stromatolites system timeless tour tourism tourist track trail travel tunnel vast wales walk walkway wall blue mountains inside