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Ride through London’s hidden 100-year-old postal railway at The Postal Museum🚂 Deep beneath the streets of London, you’ll find a secret underground train called the Mail Rail, where visitors can explore the city’s hidden postal railway and discover the fascinating history of London’s postal service. Jump onboard the miniature train and travel through original tunnels and abandoned platforms, and enjoy interactive exhibits that bring more than 100 years of postal engineering to life. Have you go