Reaching 92 degrees Celsius which is almost boiling point, this is a hot spring that can burn! The pool is shaped like an ear, hence its name. It erupts seldomly; the last known eruption was in 2018 and the one before that was 14 years prior. In the 2018 eruption manmade objects such as coins, a cement block, and a baby pacifier were ejected with the water. Moral of the story: leave the park without leaving anything behind.