I recommend strolling around the city center, peeking into souvenir shops, and trying local foods in one of the restaurants. Make sure you stop by to photograph the famous Lutheran parish church Hallgrímskirkja.
The Icelandic capital bursts with colors: like many inhabitants of other northern regions, in order to avoid bad mood and depression, Icelanders paint the walls and roofs of their houses in bright, cheerful colors.
Another fun interesting fact about Reykjavik: every Friday night, pubs and bars become the hives of activities. Icelanders have fun to the fullest: by midnight they get out of the drinking establishments to the narrow streets and continue celebrating the end of the week.