Have you ever heard of the "temazcal" phenomenon? It's still used in some areas of Mexico and even in Central America. Since the ancient time, people have been visiting temazkal in order to purify their souls and bodies. Actually, people made it cross-functional: it was a shrine and a place for the sick and for pregnant women. Priests were looking for the vision quests inside. The place was considered sacred and vivifying.

More Info: en.wikipedia.org