We chat with Jack Wells, founder of Mystery Guides, about turning UK city exploring into a story-led treasure hunt using a physical book, real history and real hidden treasure. Tracy shares her own experience doing the Winchester guide - and why it's one of those travel days that genuinely sticks with you. What a Mystery Guide is and how it works on the dayWhy a physical book beats doing it on your phoneTracy's first Mystery Guide in Winchester and the shared experience of bumping into others...