Visit Your Visit Tree Trail Explore the grounds of St Albans Cathedral with our tree trail! Our 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. The Tree Trail is on sale in the Cathedral Shop for £2.