We woke earlier than usual so that we could rush to catch the 10.15am eruption of the Lady Knox Geyser at the Wai-O-Tapu Thermal Wonderland. The geyser doesn’t naturally erupt at 10.15am; a park guide induces the eruption by adding soap (or something slightly more sophisticated, I’m not sure) to break the surface tension. The water shoots up to about 20 metres and it’s quite a spectacular sight. We spent some time exploring the rest of the attractions at Wai-O-Tapu but it was a rainy day so we skipped the furthest track which had a lot of steps. We still managed to see a lot of interesting features though.