You might be surprised where you can get to by Tube. It goes way out into glorious countryside but there are quirky buildings and general oddities to be found in the places that were once villages but have now become part of London. Many of the routes are quite short - often less than two miles. These are useful for lunch-break exercise or for people who like exploring but don’t want to walk very far. On the other hand, trails can be linked up to make a full day out. Something for everyone.