cliff coast coastline look out ocean picturesque ponder pondering sea sky surf trees view beach blue caribbean Dominican palm relax republic sand tree water boat boats cloudless harbor harbour masts quay river sailing sports dusk Greece Greek hills mediterranean natural nature orange pink ripples sunset background blue.azure clear colour holiday island kefalonia rocks caves cliffs danger Pembrokeshire shore stone wales welsh cumbria England english Great Britain Morecambe Bay sandflats cave cavern tide waves