Visit to the Hell Fire Club is another great scenic location in Dublin, located in the Dublin Mountains.
You can spend up there an hour or two walking around and taking in the view.
I’ve been there at day time & night time, both times are great to visit.
In day time you get to see most of Dublin from where the house is located and at nigh time you get to enjoy the city lights from the high view, the Hell Fire Club is located at 383 meters hill.
It also offers some short walks around there and easily accessible to park the car here before committing to the walk.
Enjoy!