Doc martin walking tour step into the world on the other side of the screen and visit the home of itvs doc martin discovering the fictional town of portwenn as you move through the real life port isaac on this doc martin walking tour for two your guide is a local who featured in the show as well expect plenty of anecdotes as you learn more about your favourite tv show than youll find anywhere else after issue of the voucher the participant will usually have 9 months to book and redee