Photo Inspiration for August

This month's photograph was taken during a walk in the Grosvenor Park in Chester with my children. I can't find any information on the archway anywhere. It is simply described as a 'relic'.

There's a smaller archway to the right hand side and behind me is another archway. Looking at the three together, it was probably the two ends of a walkway at one time, but why the very small arch?

What does this image make you think of? The people who have passed through it? The building it was originally a part of? The era of its creation? What would this inspire you to write?