Get into Active Walking
Walking is a fun and easy activity that gets you out and about in beautiful countryside, picturesque parks, or even in towns and cities. It is easy to set your own length, walk at your own pace and visit places that you enjoy. There is very little equipment that you need, although some stout walking shoes, and a small back pack will probably be useful; however, depending on your terrain (and the weather) you may need a few more items.
There are plenty of signposted walks through the UK and abroad from pleasant half hour strolls around a park to longer multi day hikes. Looking up a local walking club can be a good place to start or visit a local tourist information centre who can advise you based on your ability.
Walking a circular route is often the option for the least hassle with transport as you start and finish at the same point.