Borna is a tiny, sub-tropical area at the northern tip of Antalya. The creation of the underground Caves of Tukiyomi by the separation of the continents allowed the healing waters of the Goat Bay to seep underground, be heated by the planet and resurface, creating miles and miles of hot springs.
The Tochikans use this as a sauna, and it is believed that is what grants them long life. The saunas are used as a battle location in My Monster Rancher.
It is also the fourteenth gameplay area in Monster Farm Lagoon. You visit here after you arrive on Antalya. This area has ___ Levels.