Sanadome

Sanadome is a thermal wellness resort in Nijmegen, Gelderland, built around two natural underground sources it drilled and owns: a freshwater thermal source reached at around 70 metres, and a saltier, iodine- and iron-rich thermal brine source drawn from roughly 700 metres. The water rises naturally at about 23°C, qualifying it as genuine thermal water, and is then warmed for use in the resort's indoor pools (up to 37°C) and outdoor pools (around 33°C). The mineral-rich brine is classified under German spa standards as an iodide-containing thermal saline water, valued for its therapeutic properties, and the facility holds a European Ecolabel certification recognizing it as a legitimate thermal spa rather than a standard heated pool complex.