Hot Water Beach, Coromandel Peninsula, North Island, New Zealand:  This place was unbelievable.  Under the sand beach lies a hot water spring, which is accessible for 2 hours either side of low tide.  The water reaches temperatures of 67 degrees Celsius, and people hunt & peck for the perfect spot to lie in the toasty water. We rented a spade from the local surf shop, made our way to the beach, dug the perfect hole (not too hot, not too cold) and chilled in our personal hot spring for 3 hours.