Holes exposing the 100 year old postal railway tunnels that run beneath London’s streets have opened up all over the capital. The ‘hole’ pictured shows Liverpool Street beneath, which was one of the stations on the old Mail Rail stations. The miniature stalactite-filled ‘Mail Rail’ tunnels open up to the public for the first time on Monday 4 September 2017.

Tickets for Mail Rail at The Postal Museum are released tomorrow (Friday 1 September) via postalmuseum.org.