Polynesian Spa

Hot Water Beach is a world-famous coastal phenomenon where underground geothermal springs filter up through the sand between the high and low tide marks. Visitors rent or bring shovels to dig out their own personalized spa pools in the sand, which rapidly fill with steaming, mineral-rich thermal water. The hot water contains high amounts of sodium chloride and calcium, filtering from deep subterranean reservoirs. The soaking experience is entirely dependent on ocean tides, as the thermal area is completely submerged by the sea outside a two-hour window on either side of low tide. The beach is scenic but features hazardous rip currents, making swimming in the open ocean highly dangerous. The experience is entirely free, though parking and shovel rentals incur small costs.

Otumuheke Stream is a popular, completely free natural hot river that cascades over smooth rocks directly into the cold, pristine waters of the Waikato River. Bathers can find their ideal temperature by moving closer to the steaming stream inlet or further out into the main river blending currents. The local council recently upgraded the park with modern wooden viewing decks, changing rooms, public toilets, and a small cafe kiosk at the entrance. The natural pools feature gravel bottoms and are surrounded by lush native grasses and riverside walking paths. It provides a highly social, scenic, and authentic outdoor soaking experience. Parents must monitor children closely due to the adjacent river's swift, deep currents.

Kerosene Creek is a widely popular, completely natural geothermal stream that flows through a dense forest of native ferns and exotic pines. Bathers sit directly in the rushing warm river current or relax underneath a two-meter natural waterfall that tumbles into a deep sand-bottomed pool. The water contains natural volcanic sulfur, giving it an earthy aroma and a soothing, natural feel. The attraction is entirely free and undeveloped, lacking lifeguards, changing facilities, or toilets. Visitors change in the forest and leave their belongings on the riverbanks. It offers a raw, magical wilderness experience that is highly popular with both backpackers and locals. Theft from vehicles in the isolated gravel parking lot is a common caveat, so travelers must leave no valuables inside.