Arthur’s Seat is a jagged, grassy hill, rising up from the urban sprawl, a reminder of the now-extinct volcano, its last eruption was 350 million years ago. No one really knows why it is called Arthur’s Seat, although believe it is a connection between Edinburgh and King Arthur.If it’s panoramic and breathtaking views you are after, the summit of Arthur’s Seat offers one of the best vantage points over the city.