Caryophyllaceae flowers Greece Greek Mystras natural nature pink plant rock ruins spring wall wild America boulder clean clear cold fast flow pure river transparent water blue coastal Leguminosae Lofoten Islands norway norwegian rocks summer vetch Euphorbiaceae green pin-cushion rocky spurge stony yellow boulders colorado daytime Denver destination erosion Fountain Formation geology geology landscape Morrison outcrop outdoors park Red Rocks red rocks park red sandstone Rocky Mountains sandstone scenic sky usa background Cornish cornwall England english eroded gray Great Britain grey layers texture worn cliff coastline horizon sea shore stack tide waves cracked lines sedimentary Balearic Islands formations limestone Lluc majorca Mallorca pleated shapes Spain striated striation trees