Arthur's Seat is a cool hill in Edinburgh, Scotland that used to be a volcano. It's like the main peak of a bunch of hills in Holyrood Park. People say it's named after King Arthur, and there are some ancient forts up there too. You can climb it pretty easily and get awesome views of the city. Plus, there's this whole mystery about tiny coffins found on the crags. Overall, it's a rad spot for a chill hike with some history vibes thrown in.