Hummanaya Blowhole is the only known blowhole in Sri Lanka and it is considered to be the second largest blowhole in the world. "Hummanaya" (Sinhala: හුම්මානය = හූ+මානය) refers to the noise, "hoo", that can be heard a distance away when the blowhole is active.
The Hummanaya Blowhole is located 1.1 kilometres (0.7 mi) from the small fishing village of Kudawella, which is 28 km...