Iveagh Gardens

This hidden area, dubbed Dublin's "secret garden," feels miles apart from the nearby, constantly-bustling St Stephen's Green.
While friends chat over elegant picnics and a bottle of wine after work, employees from nearby offices stop by for a quick lunch.
A serene background is provided by chirping birds and gushing waterfalls.

In Dublin, Ireland, between Clonmel Street and Upper Hatch Street, next to the National Concert Hall, are the Iveagh Gardens (/avi/; Irish: Gairdn U Eachach).
It is recognized as a National Historic Property and is a national park as opposed to a municipal park.
In contrast to other green spaces in Dublin, the gardens are almost entirely surrounded by buildings, making them less apparent and a little more difficult to locate.
They are thus one of Dublin's best-kept secrets.