It was odd to be back. My last trip to Dublin, in 2017, was in December. Along with one of my childhood friends and his little brother, we wandered around the city in the cold and dark. We did a lot of walking and a lot of drinking, but not a great deal of sight-seeing. Now, nearly six years later, I was here in early September for a family vacation. The weather was warm, the days long, and I could finally see all the great monuments of Dublin.

Oriented around the River Liffey, Dublin is far ...