Mikokoro, Center of the Sea, is a sacred island off the coast that consists of a single immense boulder of uncut crystal or diamond that juts out from the sea. The boulder is strung with shimenawa, huge ropes that designate a sacred site.
"Center of the Sea, Eye of the World, Shrine of Enlightenment. Seek it for answers. Seek it for healing. Seek it and return transformed." - Scroll fragment from the ruins of Minamo