Located atop a rock plateau overlooking verdant jungle and a vast plain is Sigiriya, the mysterious remains of the 5th-century fortress of King Kasyapa. These ruins of Sigiriya are the most unique of the ancient sites in Sri Lanka. Be sure to brave the rickety-looking spiral staircase to see the awesome 1500-year old painted frescoes located beneath an overhang about 90m up the rock. This archaeological site, unparalleled in South Asia, is a place of pilgrimage for Sri Lankans and has been declared a World Heritage Site.