Visit Your Visit Tree Trail Explore the grounds of St Albans Cathedral with our new tree trail! Our brand new tree trail is fun for the whole family. Discover the history of some of the most ancient trees in St Albans, learn to recognise the different species and find out all about their uses and symbolism, past and present. The trail takes around 45 minutes to complete, beginning with the famous cedar tree in Sumpter Yard and ending in the Abbey Orchard. Tree Trails are available in the Cathedral Shop and cost £2.