Volcanoes near this beach on the eastern edge of New Zealand’s North Island develop large underground reservoirs of extremely hot water. Over time, this water escapes to the surface, cooling along the way, though still emerging at temperatures as hot as 147 F (64 C).
Highlight: The hot springs are accessible only at low tide; those with shovels can create ad hoc spas in the warm sand. Want to visit? Check out Coromandel