Not far from the Collingwood/Takaka Road is the sacred site of the clearest water springs in the world, and the largest in Australasia. The 'pupu springs cover a large area, where water escapes through gaps in the marble rock that underlies this area. This is not avolcanic phenonomon and the water is absolutely pure. The swirl you can see in this pic is just one of these springs. The majority of the 14,000 litres a second that comes up here comes from a cluster of eight vents in this main pool, of which the largest is 1.5m wide.
The birds beyond are wading. Around the pool the rock comes up in a sharp cliff to just below the surface.