Rathnapura is the City of Gems. The main industry here is mining. You will find some precious stones like rubies, sapphires, and cat’s-eyes. mined in the valleys by River “Kalu Ganga”, this is located 103 km from Colombo in the Sabaragamuwa district belonging to the Wet Zone of Sri Lanka. You can visit Bopath, Katugas and Kirinda waterfalls and Gemnological and national museums here.