At Lanayru Great Spring, you will find the Upland Zorana Skyview Tower above a cave system.
Tower Location
This tower is located at 2840, 0570, 0376 and can be reached via Upland Zorana Summit Cave.
Access the Tower
Throw a Splash Fruit at the muck blocking the door of the tower, then open the door.
Map the Region
After you go into the tower room, examine the terminal to activate the teleport location here. Then step onto the glowing spot in the tower and examine it to be launched upward and map the Lanayru region.