A Cornish knight fetches an Irish princess for his uncle the king, and a love potion on the ship ruins everything. Tristan and Iseult is a medieval legend told in many versions since the 12th century, and every retelling sets it on a slightly different map.
This route follows the lovers from Tristan's drowned homeland to Dublin, Cornwall and Brittany, ending on the island that carries his name. Almost every site is a tradition rather than a fact, so each pin says how sure it is.
King Arthur belongs to no single place. His story was built up by Geoffrey of Monmouth, Thomas Malory and many others, and this route follows it in the legend's own order: Merlin's dragons, Arthur's conception and coronation, his battles and court, the last fight, the sword in the water and Avalon.
Every pin marks a real place that tradition has attached to an episode, not a site proven by history, and each stop says where the link is doubted.