The legend of King Arthur looms large over the marshes and hills, west of Bridgwater. We cycled across the fabled Avalon Marshes and up the lower slopes of Glastonbury Tor, where names like Arthur, Guinevere, Merlin and Morgan are part of the cultural fabric. In Britain’s smallest city, we saw our first great, English cathedral. Then we descended back to sea level, and the vibrant city that gives Bristol Bay its name.