If you'd like to inject a little more culture into your getaway, put Laxnes Museum on your to-do list. See if guided tours are available or just wander around at your leisure.
This museum in Mosfellsbær is well-liked by travelers, so be sure to put it on your to-do list. Don't think that's all there is to do here, though. There are plenty more options waiting for you to appreciate after Laxnes Museum. Skalafell Ski Area, Alafoss Waterfall, and Varmarlaug Swimming Pool are nearby.