I visited Mount Usher with my mama; it's a stunning garden in Co. Wicklow, less than an hour from the centre of Dublin. For a small fee (worth it) you can walk around a rare slice of loveliness, and the weather doesn't really matter: we were there on an overcast day and it was still beautiful.
There are interesting grouping of plants, flowers and trees.
There is also a river running through the heart of the garden and many bridges.
I keep thinking Penelope Bridge sounds like the plucky heroine of an adventure book.
No, she didn't jump - honest.