A wood-fired sauna built into a converted horsebox, parked in a field on the side of the Chevin above Otley, next to the Chevin Inn. Social sessions last 50 minutes, run on the hour on selected days and take six guests at most, with Urban Ice Tribe cold plunges and a wild shower for cooling. Swimwear must be worn. Private sessions for up to eight people cost £105. The pitch and schedule change with the seasons, so check the booking calendar.