The turnoff is called Old Waitapu Road, although Google Maps shows it as Waikaremoana Road. There’s a gate at the carpark that stops you proceeding further into the forestry area, so it’s hard to miss. Very, very warm water with a bit of sulphur. It might take a while to get into the water due to the heat, but it’s great once you’re in! Just down the road is Wai-O-Tapu featuring strange volcanic landscape and a geyser they induce at 10.15am each morning.