A temazcal is a sweat-lodge originally created by the pre-hispanic people of Mesoamerica and still used to this day. These stone-built sweat-lodges vary in size and design, but they're always large enough to hold a small group of people.Temazcales are used to heal the sick, improve health and provide a relaxing experience thanks to the medicinal herbs used during the ceremony. During the ceremony, steam is released by pouring water over hot volcanic rocks. This is done several times over the course of the ceremony and gradually increases the temperature inside.