Today's walk is around Bidston Observatory, an unusual building in which the world's tides were calculated, including those for the D-Day Landings. It's now an artistic research centre and is being restored to its former glory. Presented and produced by Laura Davis

Norman Wallis comes from a long line of fairground entertainers. He takes us on a tour of Southport Pleasureland, which he now owns and used to run away to as a boy.