Sidney Wood is right on the edge of Surrey, near Alfold and Cranleigh, and the old Wey and Arun Junction Canal runs through it. Known as “London’s lost route to the sea”, the Wey and Arun Canal is a partially open, 18.5 mile (30km) canal running southwards from the River Wey at Shalford in Surrey to the River Arun at Pallingham in West Sussex.