Silfurfoss (the Silver waterfall) is definitely one of these hidden gems Iceland has to offer. Off beaten track, almost unknown, still charming.
How to find Silfurfoss:
It is an easy less than 10 minutes hike from the Hólaskjol campsite a bit off the road F208 in Icelandic Central highlands.
GPS coordinates of the Silfurfoss waterfall: 63.907226, -18.614190 Take me there!