70ft below #London there were 22 miles of tunnels specifically for delivering mail throughout the city. You can ride a portion of these rails & learn about the system which ran from the 1920s to the early 2000s. “Mail Rail” is located across the street from the Postal Museum, and is a less than 20 min walk from St. Paul’s. A fun and different experience from London’s standard tourist fare. Here’s a link showing what the experience is like: https://www.threads.net/@john.gallaugher/post/C8iDSSlSiyQ/?xmt=AQGz0FLgAyXoHr2BY4ySy4bXm-FKGCC8ltQJBfoAj9BVxQ #MailRail #PostalMuseum #Travel