In Buddhist philosophy, a giant mountain called Mount Sumeru was believed to stand at the centre of the world.
This huge mountainis enclosed by a series of eight concentric oceans and seven mountain ranges. The outermost of these, called Cakravada Mountain, is located at the very edge of the world, and in the ocean just inside it [i.e. the outermost ocean] islands are depicted to the north, south, east and west of Mount Sumeru respectively
The quadrangular, mountain shines in the colors of the four precious stone, from which he is assembled sapphire, ruby, topaz / emerald and diamond. Around the mountain the ocean shines in the four colors of the four sides of Mount Meru.
Mt. Meru [= Kailash] is sacred to the Hindus, the Buddhist, the Jains, and the Bonpos. For the Hindus, the mountain represents the seat of Shiva. For the Buddhists, a terrestrial projection of the cosmic Mandala of Dyani Buddhas and Boddhisatvas.
The Kailash is located in a remote corner of Western Tibet. The area was opened for foreigners 1980.