Johnstown Castle & Gardens is in Wexford and is incredibly easy to find. The Castle is 19th Century in date, even though the Estate dates back to the 11th Century when an English family called the Esmondes settled in the area shortly after the Norman invasion in 1169. The castle now houses the Agricultural Museum, a museum with an installation about the famine and a huge toy car collection. It really is worth visiting. Sadly, the Castle itself was closed on the day we were there, however, there is so much to see that our visit was incredibly interesting anyway. I will be back to this location in the future, as there are numerous photo opportunities available.
http://www.irishagrimuseum.ie/johnstown-castle-gardens/
Gallagher Photography 