The Geométricas Hot Springs, anciently called Cajón Negro, are inmersed within the majestic beauty of the Villarica National Park, near the town of Coñaripe. These are the result of an ambitious project carried out by architect Germán del Sol. By constructing with wood and noble materials, he sought to take nature into geometry so as to achieve a harmonious whole. This new, original thermal complex is located next to the Aihué stream, which has abundant water sources.

One of its special features is the wooden footbridge that crosses by the entire center and is used to visit the ravine. Under this bridge, 450 meters below, thermal waters flow until arriving at different wells through a wooden gutter.