Street Pew is a crowd-sourced interactive map of roadside Shrines and Grottos in Ireland as captured by Google Street View. If you know of a site that is not on the map you can add it by clicking the 'Add Shrine' at the top right of the page.

This site was hacked together quickly, if you have any sugestions (or spot any bugs) do get in touch.

If you still want to know more there is a blog post here which might be of interest. You can also view a heatmap of the locations.