The earth sauna is almost as old as humanity itself, though it wasn't known as a sauna in the past. It was a simple and popular way to warm up in caves or underground structures. Today, of course, things are very different and offer many modern conveniences, but it still goes underground, and for good reason. Disturbing noises and external influences are almost completely eliminated; only silence, pleasant warmth, and the shared experience of being together remain in the earth sauna. The basic structure is usually electric and Finnish-style, but there are also earth saunas with a wood-burning stove, which make it even cozier. Earth saunas are generally not very large