Walking
Going for a long walk is a great way to have fun while staying healthy. Getting involved in some exercise will help to keep your joints mobile and the fresh air is always good. Try hiking in the countryside, or if you want something a bit less strenuous, drive out to a little village and go for a relaxing walk.
Writing
As you get older, you may be thinking about all your past experiences and adventures. Why not write them down and turn them into your own personal memoir? Retirement is when you have time on your hands so make a note of all your memories and give it to your family. They will love being able to find out about all the things you've done over your life. Or alternatively, if you have an active imagination, pen your own novel. You don't have to take it to a publisher; just get the enjoyment out of writing. Sitting outside in your backyard with a cup of tea and your notepad can be just the inspiration you need to get creative.
Holidays
Going on holiday is a very relaxing experience at the best of times, but when you get older, you can usually take it as easier without having to make sure anyone else's needs are met. Family holidays with the children are fun, but when it's just you and a partner, you can make the most of each other and having some peace and quiet. Choose any destination you like to meet your personal tastes. Residential park homes are great if you just want a break from day-to-day life. A cruise is a good choice if you want your every need catered for and the opportunity to visit lots of different destinations.
Learn a skill
How about taking a class and learning to do something you've put off doing up until now? It could be a dance class or perhaps learning a musical instrument. There are plenty of clubs and classes that run all through the day so there's a lot to choose from. Even if you go once and don't like it, at least you've finally discovered what the fuss was about. It's also a great opportunity to meet new people and develop different interests.
Gardening
Cultivating your very own vegetable patch can be very rewarding - and fun as well. Being able to eat home-grown, fresh produce can save you money and give you a project to work towards. It will need careful attention so if you already have a keen interest in gardening and the outdoors, give it a go. If vegetables aren't really your thing, you can always focus on filling your garden with flowers instead. The colors will make the garden pretty to look at and will also provide opportunities for all sorts of wildlife to visit your garden. Leave out birdseed and see how many different species suddenly come for a look around.