I had not visited King John's castle for many years and finally decided to make the trip this weekend along with my wife and son. The castle is located in the medieval part of Limerick city and looks out over the Shannon river. St Mary's Cathedral is a short distance away, as is the Hunt Museum, so all three can be easily visited in the same day. Parking near the castle is awkward so best advised to either use one of the many car parks in town or try parking near the Cathedral. There is a very nice pathway from the Cathedral to the Castle along the Shannon river and only takes a few minutes to go between locations.
The entrance to the Castle is through the Visitor Center and the entrance fee is Eur 9 for an adult and Eur 5.50 for a child. Full details of the fees, opening times and directions can be found on the www.shannonheritage.com website. First stop on the tour is a short slide show showing the development of Limerick and the Castle. From there you enter a display area which provides a timeline of the Castle in the context of local and international events. There are fullsize models of historical figures, some detailed displays and good information boards. This area leads onto a 15 minute show (in english only) which concentrates on the 1691 siege and which I found quite informative and well produced. After the show you can enter the courtyard and from there you can see the archaelogical excavations under the visitor center which are well worth the visit. The north west tower has some interesting displays and also allows access to the top of the tower. From there you will have excellent views of the city and the Shannon river and can walk from that tower to the main entrance towers. There are two other towers (south-west and north-east) that you can visit. In the courtyard you can view further archaelogical digs that reveal walls, pathways and a "sallyport" which is side entrance used when someone had to leave in a hurry!
Overall the visit to the Castle was much better than I expected and as I previously noted, can be easily combined with a trip to the Cathedral which should give the visitor a very good sense of life in Limerick in medieval times.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC