Hummayanaya is the largest blow hole in Sri Lanka and second largest of the six large blow holes in the world. Hummayanaya is a natural fountain which happens as water from the sea rushes through a cave under the rocks and pushes outward.
The place is located in a small coastal fishing village Kudawella near Hambantota. During the southwest monsoon, especially in the month of June, the display of blowhole seems most spectacular. The outlet is at a top of the fissured cliff about 20 meters above the sea level.