Stay: Airbnb: "Cosy Apartment Downtown Reykjavík"
Things to Do: Hallgrimskirkja Church; Harpa Concert Hall; Fótógrafí Photo Gallery; Laugavegur Street; Perlan
Eat: The Coocoo's Nest; Egill Jacobsen Kitchen & Bar; Austur-Indíafélagið; Sandholt; Brauð & Co.; Hlemmur Mathöll Food Hall
Picture Perfect: Sun Voyager Sculpture; Old Harbour; Parliament House; Grotta Lighthouse
Pro Tip: Purchase advance tickets to the Blue Lagoon for either before or after your flight. The geothermal spa isn't terribly far from Reykjavík, but it's only a twenty minute drive from Keflavik International Airport.