Chakravāda ［鉄囲山・鉄輪囲山］ (; Tetchi-sen or Tetsurin’i-sen): The Iron Encircling Mountains. The mountain range that, according to the ancient Indian worldview, forms the circular periphery of the world. Located at the center of the world, Mount Sumeru is surrounded by eight concentric mountain ranges, which are separated by eight concentric seas. The Chakravāda are the eighth and outermost of these mountain ranges and are made of iron, while the other seven are made of gold. See Iron Encircling Mountains.