We are two adults two girls ages 13 and 14. We arrive June 27 and depart on July 6. We are flying in and out of Heathrow. We would like to spend 3-5 days in the city and 3-5 days in the country or vice versa. I have the city days covered with the usual sights and Harry Potter. It's the countryside I am struggling with. I think the Lakes District might be too far in only 8 days. What area would you suggest? We like interesting landscape, architecture, photography and hiking. Simple comfort meals. We would prefer not to rent a car but travel by train or bus. Thank you.