You can’t go see Kalmar without seeing the island of Öland next to it. Origins of this island date back to 8000 BC so the amount of history here is enormous. Rent a car and see places like Borgholm Castle, Solliden Palace, Långe Erik, Långe Jan, Lerkaka, Ismantorp Fortress, Eketorps Borg, Mysinge Hög, Köpingsvik Beach, and countless Rune stones (Runsten) from old Swedish lore.