A set of swimming and relaxing pools fed by a natural boiling spring. A lot of effort goes into cooling the water down to 40 deg C from
98 deg C.
Click on a picture for a larger version.

These terraces help to cool the water

Christella Ferns are found around geothermal areas here
and in the South American rain forest... dating them to before the splitting of Gondwanaland 85 million years ago

The spring feeds this pool

The white material is a crust of sulphur

Wetland area behind the pools

The collection area for hot water

Trees with white sulphur crust

Fountains help cool the water