Having been a cyclist most of my life, injury to knees has set me in another direction - Walking. This comes with the added support of our dog Bouzy, a small and lively Jack Russel, the walks benefit us both.
Where we live there are many walks albeit not hilly but all the same good distances which with correct planning can be completed in a day. The Sandstone Trail is one such and runs the length of Cheshire for 33 miles. Beyond Cheshire we have Snowdon, the Lakes and the Peaks in reasonable driving distances.
One thing that I have noticed with walking is, while you can see many things driving, more things cycling, you can see the most walking as it take take you further and higher.
The amount of paths in the UK is incredible, see the National Trails, and this is replicated in mainland Europe and North America. So we should never be short of a new walk.