Platform 9¾

This guide to Platform 9¾ at King's Cross in London traces why J.K. Rowling picked this station for her fictional portal to Hogwarts, back to her own parents meeting here on a train north to Scotland in the 1950s. It also covers the mix-up that put the wrong platforms in the books, since Rowling was picturing Euston rather than King's Cross when she wrote them, and how the half-swallowed luggage trolley now on display has moved twice as the station was rebuilt. Expect a queue for the photo.