We used our Reykjavik City passes to catch the ferry to Videy. It is very quiet and relaxing there. Just nature, some lovely old buildings and Yoko Ono's Peace Tower to see. Coffee and food available in that big house you see in the photo, or take a picnic and explore the island. Plenty of return ferries to choose from. Not recommended as disabled access friendly - steep climb up the hillside when you get there.