"Visit the Baltic island of Öland Fly into Kalmar from Stockholm (less than an hour), pick up a rental car, and drive over to this island, a major vacation spot for Swedes due to its temperate climate. You can also catch the ferry that runs between Oskarshamn and Byxelkrok. You could easily spend 2-3 nights exploring historic Viking sites such as Gettlinge and Eketorp—one of 19 Iron Age ring forts across the island."