afterdeck anchored appearance colors colours deck dutch flag Flags forecastle furled hawser hoisted immobilised immobilized jib lines maritime mast masts mooring moorings nautical ocean-going port power ready rigging rope ropes safety sail sailing sails seaworthy secured security ship shroud standing-rigging stay staysail stop stopped strength tall-ship tall-ships transport vessel Australian repairs scaffolding accumulated accumulations aged calcium-carbonate cave cavern caving ceilings coloring colouring columns compounds crystallisation crystallization crystallize deposits distinctive edges formation forms geological geology icicle-like limestone mineral-deposits minerals old Particles pointed shape shaped shapes slow slow-growth slowly smooth speleology speleothems spelunker spelunkering Stalactite stalactites subterranean surface surfaces texture textures Underground unusual angled angles architectural-elements clean community evergreens flora flowers foliage garden green greenery ground-cover layered layers levels light maintained multi-level paving peaceful perspectives placement planned plants public retaining-walls rockery rocks seating shrubbery shrubs slope sloping stones stonework strong sturdy terraced tranquil trees vegetation abstract background barrier brown constructed craftsmanship heritage historic local-stone patched patchwork pattern patterns perspective picturesque random randomly-coursed rock rough secure significant solid stone stone-walled stucco surfaced traditional uneven variations variety wall well-built