Abstract: A portable sauna is described, being formed in the shape of a sphere. A door leads into a spherical shaped room wherein a bench extends about a central circular floor. Above the bench is a loft lying adjacent a plane that passes through the center point of the spherical shape. The sauna may be selectively heated by any combination of heat lamps, dry heated air blower, and a steam generator, all of which operate on common household current. Water for the steam generator is supplied by a self-contained reservoir. Ventilation can be controlled by the occupant through a skylight ventilator or automatically through a valve mechanism interconnected with the blower. The valve mechanism is operable to recirculate room air or to receive indirect outside air into the room. Selectively controlled lighting and audio systems are also included to allow further control of the enclosed environment.