When I did my research, I didn’t see much rave over Gullfoss. A lot of it said it was massive and beautiful. But holy moly! Gullfoss, overall, with size, look and power was my absolute most favorite waterfall in Iceland! You can admire it from afar or you can get right up to it.
If you only have time for one thing on the Golden Circle, I definitely say go to Gullfoss!
Source: Iceland: Gullfoss – iamhli