Located on the Polonnaruwa ancient city complex, this gigantic uncompleted Stupa has been built by king Parakramabahu (1153-1186) using the labour of Tamil (Demala) prisoners brought from India when he attacked the Soli Kingdom in South India. For some reason he has been unable to complete this and at a later stage a smaller Stupa has been built upon the uncompleted semi-spherical structure. Some believe that since this was built at two levels it was called “Demahal” (two storied) Seya which later became “Demala” Seya. Had this Stupa been completed this would be 186 metres (570 feet) tall and would have been the largest Buddhist monument built by man. Its circumference of this stupa is massive 650 meters (approx). It is alleged that the king Parakramabahu wanted this monument to be seen from India, thus the planed the size accordingly. Today this massive stupa is only a large hill overgrown with trees. There is no indication of this hill being a stupa other than a part of 3 outer rings of about 10m in length. Passing these rings there is a footpath leading to the top of the stupa. The climb is not that easy but worth the effort. The flattened top of the stupa is also overgrown with huge trees.