Reykjavík
We arrived on a red eye and so got there early morning. Once we got into town, we went straight to a local bakery for coffee and breakfast. The Icelandics know how to eat! Food there is generally delicious, albeit very expensive (but the whole country is expensive). We rented a car as we knew we were going to be traveling on day trips and wanted to freedom to do so. After breakfast, we settled at our airbnb, and after a nap went out to explore Reykjavik. It’s a pretty small city, and easy to walk through in one day. We walked the now famous rainbow walkway to Hallgrimskirkja Church at the top of the square with its gorgeous tower. There is tons of shopping and food on this strip. We got crepes from a crepery - they are famous in Iceland, and worth the hype. We had dinner at Sæta Svínið Gastropub and ended up going back 3 times that trip - it was our FAVORITE place.
That evening, we had reservations at the Blue Lagoon hot spring. Get your tickets well in advance (like, over a month out) as the time slots sell out fast. There are a few different packages and add ones like mud masks and drinks that you can add. It was amazing at sunset time.