Diego Delso, delso.photo, License CC-BY-SA
The remote Castle of Zafra, scene of Tower of Joy in Dorne, requires a careful trek if you want to visit. On "Game of Thrones," the Tower of Joy was the place of one of the most pivotal reveals in the series. When Prince Rhaegar Targaryen (Daenerys' brother) and Lyanna Stark (Ned Stark's sister) married in secret, they took to the castle in the Red Mountains of Dorne to hide their forbidden love. Years later, Ned's son Brandon Stark, blessed with powerful magic and the ability of a Greenseer to perceive the past, glimpsed back to see his father storm the castle.