The Magul Maha Viharaya lies about 22 km off from Siyambalanduwa town and about 11 km off Pottvil town. This temple is said to be built by King Kavanthissa in the 2nd Century BC on the location where the King married the princess Vihara Maha Devi. The foundations of the “Magul maduwa” where the wedding ceremony took place can still be seen in the vihara premises. The entire Vihara where ruins of a palace, moonstone, monastery, Bo-maluwa, stupas, ponds etc. are found scattered all over. The moonstone here is said to be unique in the country as this is the the only location where elephants are carved with their mahouts in the moonstone. This a exceptionally significant tourist destination in Sri Lanka.