Sea stacks are amazing vertical rock formations that stand in the sea, formed entirely by wind and water as the forces of nature break up part of the headland over time. There are some famous stacks around the world, for example, the Twelve Apostles in Australia or the Old Man of Hoy off the coast of Orkney in Scotland. Tirrell Brown has created a beautiful scene with sea stacks, just off the coast of the imaginary land of Mitgardia. The castle is centrally located upon one of the larger stacks, jutting out the sea with it’s small wooden pier. Tirrell’s sea is very striking, with the combination of dark blue and medium blue depths and transparent waves crashing against the craggy rock faces of the sea stacks.