Unlike many things photographed stairs have an attraction of their own, a sense of mystery or perhaps a purpose greater than their utilitarian function. The sense of going somewhere, of climbing to a vantage point. It is so often a set of stairs or ladders that feature in movies as a means of escape from being hunted, often a futile climb to a place that has no escape. This is where I wish psychology was my area of expertise but its not so this is all just my observation and can be taken with a grain of salt.
Whichever way one looks at it stairs are inviting in photography.Hence the reason for this photograph.