The tomb or the Hierotheseion of Nemrut Dağ bears unique testimony to the civilization of the kingdom of Commagene. It dates back to 69-34 B.C. and is one of 10 World Heritage Sites in Turkey!
More than obvious, but there is one thing a lot of people still don't know (or they are just too lazy). Be there before the opening and enjoy it without waiting in line and less people on these narrow stairs.