Close-up of the old brick wall of the Terezín Fortress with a small arched entrance, surrounded by grass and a clear sky above

terezin fortification archway wwii site fortress walls sites entrance wall site brick military architecture bricks heritage relic history defensive 19th century memorial historical structure landmark architecture tourism preserved large no people holocaust destination tour remembrance terrain erosion aged camp site old weathered war tourist attraction czech republic military red daytime educational growth grassy moss concentration