The travertines at Pamukkale in Turkey are really fun to visit. Despite the fact that the hot springs that fed this ancient Roman spa resort are all but dried up due to poor water management, there is still some water flowing. The water is diverted periodically to ensure that all parts of the area get some of it. After walking up a hill with warm water flowing around your feet, you reach the top where the ruins of Hierolpolis great you.