This is a geothermal area with a geyser, a bubbling mud pool and an extensive area of geothermal features.
Click on a picture for a larger version.
Lady Knox geyser
Erupts at 10.15am every day...
...with a little help...
...from 300g (10oz) of laundry detergent
Which takes a minute or two to work
But the end result is spectacular
Visitor Centre with geothermal field behind
For the foreign tourists
Sulphur crystals around a fumarol (gas vent)
Preserved area of native forest
Distant cooling tower is a geothermal power station
The always fun bubbling mud