If you are staying in Reykjavik, you must go to the Perlan and have a meal there, it is simply amazing. If you’re travelling on a budget (like I was), there is a cafeteria near the top where you can get a very reasonable meal and beer and enjoy the view. If you have some more money, the revolving restaurant on the top looked spectacular, but there was no way to eat there without spending at least $100 per person. There is a fountain in the middle of the building that is meant to emulate a geysir, it shoots very high! Also, outside of the Perlan there are many hiking trails around the hill (Oskjuhild – I probably spelled it wrong!) that are worth exploring, as there are some old ruins from US Military bases back from WWII that are interesting to look at.