This site is for the people who don't like heights - Canals, by their nature are usually flat, so Canal walking is easier on the knees than the hills. This site has lots of pictures - it is surprising how many interesting pictures one can get of a canal!
Some useful references for Hill Walking in Ireland. I have used some of David Hermans books and find them very informative, although it always takes me a lot longer than his best estimate to complete the walks - I reckon I'm just not a very fit walker. However, it in no way detracts from my enjoyment of the hills.
A site dedicated to all the walks I would love to tackle if I was fit! Includes lots if interesting links and helpful information for safe hill walking
A very informative site located in England with plenty of information about the walking scene over there. I feel like catching the next plane over there to try out some of the walks!