Granni is 100 meters tall waterfall. Fair enough. But it is only 100 meters away from Háifoss and therefore in its shade.
How to find Granni:
For the detailed info about how to get to Granni, if you need a 4WD or how to get there in the winter time, please visit the page about the Háifoss watefall.
GPS coordinates of the Granni waterfall: 64.209186, -19.682976 Take me there!