Kahran is Light and Dark's home planet. There are 5 Continents, in each one, there is a giant volcano. There's Elemakstro (in the middle, where Light and Dark are) ruled by Elemakstro Chus, Sunaksus (right) ruled by Sun, Nakaneh (left) ruled by Traglo, Zoloakes (north) ruled by Luna and Donsek (south) ruled by Karalazo, he had no real name, but sometime when Light was a child, Light became it's owner and he named him Karalazo. All continents are connected.
In Elemakstro, there is a temple called the Legendary Hero Temple that was created to honor the Legendary Hero of Kahran.In the Final Destination, Destonator takes the temple (with his ability to control space like Palkia) to the cave planet in Kirby's Universe.