cliff crag craggy curves earths crust red rock formation rocks rugged usa yellow forest karst landscape limestone mediterranean natural nature rocky rough Sardinia summer tree.bush.shrub wild wood dramatic heather landmark landslip loch man mountain old pinnacle rock scotland skye steep Storr towering Trotternish barren cliffs coast coastal Gairloch grass highlands minch ocean penninsula promontory Redpoint remote scottish sea waves bare bleak canada difficult hard jasper panorama peak range Rockies Rocky Mountains shale snow summit view