The largest spa in North America Built in the picturesque village of Old Chelsea in the Outaouais on the outskirts of Gatineau Park, Nordik Spa-Nature opened its doors in 2005. Through constant innovation in new and unique relaxation experiences, it positions itself as the largest thermal spa in North America. What sets it apart is the quality and unique character of the facilities and its unparallelled offering of wellness services. The spa has quickly found its place as a major tourist attraction in the Outaouais region, welcoming more than 250,000 guests every year.