Torrential rain meant the 20min drive to wai-o-tapu geothermal area was more like 30mins. We timed our arrival to coincide with the 10.15am eruption of the lady knox geyser. Organisation can be better. Everyone got back in their cars to drive over to the geyser carpark at 9.30am, splashed through the mud, watched the geyser and drove back to the main carpark. A mini-traffic jam in the making.
I would describe the geyser show as underwhelming. A park ranger poured some surfactant into the hole and some steam splurged up. May be 20m high and 10 seconds duration.
The rest of the park made up for it. Wai-o-tapu has the largest area of surface thermal activity in the taupo volcanic zone and we followed the guidemap that showed us 3 walks. Craters, sulphur caves, mud pools and boiling springs could be seen everywhere.
Artist’s palette is a flat pool with mineral deposits showing different colours at different spots. Green, yellow, orange, grey, white. We could walk on a wooden boardwalk through the area which gave a different perspective. There is sulphur in the air, not overpowering.
Probably the highlight of wai-o-tapu is champagne pool. 65m in diameter and 62m deep with surface temperature at 73-76ºC. The name comes from bubbles of CO2 that break out on the surface. There are gold, silver, mercury, arsenic, antimony, thallium, sulphur in the water and the distinctive orange deposit at the side is from arsenic and antimony sulphide. And since it’s been a while since I wrote out compound formulae: orpiment As2S3 and stibnite Sb2S3.
We followed walk 2 down the sacred track to the frying pan flat and oyster pool. Another boardwalk let us close to the natural features. We didn’t stray from the marked paths; signs for 100ºC water warned us of the danger. There were parts where the path met water and when I stuck my hand in the stream the water was cold. Left a sulphide deposit on my fingers though. Told mum not to touch it. I can pour conc H2SO4 from one bottle to another without gloves and without spilling, but it doesn’t mean lay people should do it.
We completed part of walk 3 and headed back to the visitor centre. The last interesting sight was devil’s bath, a crater filled by excess water from the champagne pool. It changes colour from yellow to green depending on light and cloud cover. Today it was green and quite sickly.
We walked for almost 3hrs and every single minute was worth it. The rain had abated somewhat although we were glad we wore our waterproof coat and I borrowed a large umbrella from the motel that acted as walking stick for mum. They charge NZD32.50 for entrance, we had a 10% voucher from the motel and it was well worth it. I was skeptical when I was trip planning, all the geothermal areas charged hefty admission and I realise it’s for maintenance, to keep the area pristine. I also realise that had our cruise went ahead per the original itinerary, we would be stopping at tauranga today and I had booked our own excursion to wai-o-tapu, so we made it.
Lunch was at the café. Pies and I had L&P lemonade.
We had the rest of the afternoon. The option was to go back to rotorua or go to another geothermal area. We found ourselves at waimangu volcanic valley. They offered senior discount, so NZD30 for mum and NZD37 for me.
The straight route from the visitor centre to lake rotomahana is supposed to be around 2hrs. We made it to echo crater and frying pan lake faster than recommended. May be the same people explored the region, the craters and lakes are all named the same.
Cathedral rock was originally named Gibraltar rock because of its resemblance to the latter. There was an eruption in 1917 that changed its shape so they renamed it. Steam coming out all around it makes it look like it’s magic.
Mum didn’t take the steep 60+ step climb to infernal crater lake. It claims to be the largest geyser-like feature in the world even though the geyser itself is hidden beneath the depths. The lake empties and refills every 35 days or so. There’s a hiking trail from inferno lake to other craters but the trail is closed due to mud.
To save time and energy, we took the bus part of the way to warbrick terrace, formed from silica flowing from the stream. The green colour is due to algae formation.
The walk to the lake was unremarkable and would have been more pleasant if we hadn’t walked for hours already. Mum rested while I explored around the lake. We waited for the last bus of the day to take us back to the visitor centre.
Overall, if we had only visited waimangu we would have been disappointed in the area. I didn’t think the entrance fee is worth it and much preferred wai-o-tapu.
Back in rotorua we stopped at a petrol station, hit a souvenir shop (12 kiwi keychains for NZD9.90, and we have a 5% off voucher), and dinner back in our room finishing off the food in the fridge.