Near Goteborg are two extensive archipelagos, artfully named The North Archipelago and the South Archipelago. I only had time to check out one of them. I chose the South, largely because none of its islands allow private motor vehicles. Impressively, your metro day pass also worked on all of the ferries that scoot around between the islands, so all you need to see them is a bit of time and patience. In half a day I got to see a small fraction of what the islands had to offer, but that included a wonderful cross-island hike.