Hwasun Dolmen Site (Historical Site no. 410) features five quarries that produced capstones, an essential material in building dolmen during the Bronze Age. The stones for the capstones were gathered from the tuff outcrop. The hundreds of scattered dolmens in the area indicate that two or pieces of rocks were used to make the dolmens. The site which features “southern-style’ dolmens (used as grave markers during the Bronze Age) is one of the most densely concentrated dolmen sites in the world. Recently, variety of tools including stone swords were discovered. The site is registered as the UNESCO World Heritage Site for its historical value. Today, 596 dolmens including scores of dolmens weighing over 100 tons and “Pingmae Bawi”, the largest dolmen (weighing over 200 tons) in the world, are found at the site. Hwasun Dolmen Site is a place where dolmens, generally regarded as tombs or burial chambers in the past, were made of tuff. In addition to the Cretaceous tuff outcrop found at the site, another significant feature of the site is that the place was actually used as fact that the place was used to operate quarries.