Naturally heated water from spring are nice to bathe in, this is why a lot of visitors, foreign and local, are drawn to any hot springs.Like in Costa Rica, just around their most active volcano - Arenal, lies the Tabacon Hot Spring and Resort. The fresh water from the Tabacon River flowing above Arenal's magma seams makes up the warm water.
More about the Tabacon Hot Springs, on the link below.
Link: The Best Hot Spring Resort in Costa Rica (resorts); Cen
