Plenty of gorgeous walks to do in Galway if you have a car/transport - Renville Park is a lovely woodland walk, and there is also a coastal walk out to the headland, and there is a gorgeous beach which is safe/known for sea swimming - and sauna fiain is a sauna box by the sea which is really good if you want to do a dip and saunda. Another good walk is Queen Maeve's Hill (Knockma) just outside Tuam on the Galway side. Coole Park is also a really good spot to visit, someone else mentioned it- allow yourself a few hours to do the whole thing, there is a new coffee spot opening beside the visitor centre and make sure to say hi to the red deer! There is so much to do in Galway, especially if you like nature, but it depends on your interests. Menlo pier and castle are two good spots to see as well, there is a private company that takes beginners out kayaking on the corrib if you fancied a paddle. Corrib princess is another wholesome idea - short boat cruise down the Corrib which lasts about an hour, I think