before the british established a road system, goods were transported to coastal areas from sabaragamuwa by river. kalu river was a major river for this transportation. urugala holombuwa was used as an anchoring point for vessels and ferries transporting goods. this holombuwa is the biggest whirlpool at the place where nambapana stream connects with kalu river. it has more space and consists of a huge rock pile. because of this, boatsmen used this as a resting place.