The Ruins of Rolana are the 47th Discovery that can be made.
The ruins of a city that served as a center of trade between Nasr and the East. The ruins show a remarkable blending of the cultures of the East and the West, driven not by the ruling class, but by a strong merchant class.
The best way to reach this discovery before obtaining the Purple Moon Crystal is to head South-Southeast from Nasrad, combing the green wall that you come across. Follow this wall a little ways, squeezing through gaps as necessary due to the presence of the Dark Rift, and you'll eventually come to it. After obtaining the Purple Moon Crystal, however, you will obtain the ability to travel above the cloud ceiling, and as such will be able to merely fly above the clouds heading south from the Temple of Pyrynn. You should spot it near a green wall.