Built 1584, it is part of the original city wall of Galway stretching to the River Corrib. I’m not sure why it’s called Spanish arch. It really isn’t that impressive.
It takes all of about 30 seconds to take in. There's not much to it. You'll see it most likely once you walk the pedestrian strip. But see it just to say you saw it.
A stroll to Clifden Castle from Clifden town
While in Clifden take a stroll to the Castle. I think the castle was private property but there are good views.