That is certainly a seascape in the background, with some very distinctive buildings or structures. At first I thought it could be the Colonnades at Blackpool, but it turns out to be a similar structure down on the beach in Barry, Wales. (Compare with a modern photograph.)

I suspect these photographs were taken before Ivy met husband Charles; she looks more like the young girl posing in her best dress in a previous photograph.

Perhaps Ivy is visiting the mysterious relations in Newport, Wales, and they took her to the seaside for the day?