Get @reshare_app • @london.fun.hub London has a secret Underground mail rail — and you can actually ride it. Hidden beneath the streets, the Mail Rail at the @thepostalmuseum once transported letters across London for over 75 years. Today, you can hop on this tiny underground train and ride through the city’s hidden tunnels — a proper hidden gem and a huge hit with kids and adults alike. One of those experiences that even many don’t know exists. 100% worth adding to your London bucket list ✨ 📍