Nestled beside pristine Lake Rosseau in Muskoka, Ontario; discover Hydrospa at JW Marriott The Rosseau Muskoka Resort & Spa. Indoors enjoy the salt cave, massage chairs, and foot reflexology massagers. Then head for outdoor relaxation offerings (two barrel saunas, an outdoor heated pool, a hot tub, and a cold plunge shower). The men’s and women’s locker rooms are luxuriously appointed and each offers aroma-infused steam rooms, sauna facilities, and indoor hot tubs with views of Lake Rosseau.