Much of the journey to Ancient Briton was thought to be by sea, though parts of it would have to be accomplished by land. The distance across Gaul, for example, is a long trek. Though the specifics of the journey are lost to history, the sheer length of the trip would give rise to the inclusion of many interesting people and possible adventures along the way.
The journey would have no doubt have been dotted with encounters with peoples and cultures very unfamiliar to Jesus and his Uncle Joseph of Arimathea.
Once the long land journey across Gaul was accomplished, the next leg of the journey again required a boat, here shown landing at Cornwall. Though it is quite possible that the boat trip may have simply slid around the coasts of Cornwall without stopping there at all, the map takes into account history Jesus and Joseph of Arimathea supposedly had at Cornwall.
Along the Brue River and into the lake is the presupposed route of travel. At its center lay the fabled Isle of Glastonbury. It is accepted that Joseph of Arimathea and some of the disciples returned here after the resurrection of Jesus and spread Christianity to the locals. Many origins of the King Arthur tales sprout from this region. Some suppose a few of the knights, if not the legendary King Arthur himself, a descendant of Joseph. The lake is now gone, replaced by wetland growth, fill, drainage and developments.