ancient theater of megalopolis (4th bc) the largest in greece with a 20000 spectator capacity

sky cloud field hill landscape morning grass horizon plain nature meadow grassland prairie sunlight agriculture mountain tree pasture evening ancient theater megalopolis largest greece spectator capacity lignite fired power plants background produces electricity southern islands afternoon ancient theater antiquity arcadia archaeological archaeology background building carbon chimney clouds columns countryside ecology electric energy environment evening factory greece historic history industrial industry landscape center megalopoli megalopolis mist misty natural outdoor outdoors peloponnese pollution pollution plants ruins rural scenic site smoke smoke stack steam sunset travel white