Dublin, County Dublin
Cannot be missed. Hire bikes from the park entrance of the Dublin Bike scheme from in front of Kilmainham Gaol (credit card required, €5 for 3 days). Park is vast and features Dublin Zoo, Stately homes and beautiful tea shops. Full of beautiful wild deer. 20 minutes walk from house.
Largest public park in Europe. You can get close to the deer and also visit Dublin zoo.