beach boat sand sea water coast empty rocks sky deserted landscape lonely Northumberland background floor nature photo sandy stock texture waves clam conch Ensis siliqua food grain of sand mussel ochre ozean print razor clam sands seafood seashell shell structure ahlbeck baltic sea beach chairs distance germany holidays horizon relax roofed wicker beach chairs scenery summer sunlight vacation beige brown damp grains wet yellow coastline creature holiday tide leisure palm resort shore swim Algeciras Getares seashore crack cracked Crystal Cove rock