Dublin, called in Irish Baile Átha Cliath, is the capital of the Republic of Ireland and by far its largest city. What I liked most about its cityscape were the picturesque bridges over the river Liffey. The one that you see in the picture on the left is the Samuel Beckett Bridge, in Irish: Droichead Samuel Beckett.
During a walk from my hotel in Dublin to the Samuel Beckett Bridge I discovered these intriguing objects in the sidewalk. There are dozens of them on the waterfront of the river Liffey. When you first look at them they seem to be tiny aquariums with fish, illuminated from the bottom.