Prasat Phra Wihan (Preah Vihear) Second pillered causeway

Khao Phra Wihan at Muang Boran is an artificial hill with 54 meters high, 66 meters wide and 250 meters of hill slope. 684 pillars have been used to shore up the hill, 2,400 truckloads of rockfill were used to create the lofty hill. 40 rai of land mass was dug up for topsoil to cover the hill slope.