The 600 acre park is famous for its conservation work and is proud to bring over 90 endangered and rare species of animals to the attention of the general public.

Today's volunteer traveller is spoilt for choice; since this particular strand of tourism began in the 60’s, the possibilities have grown enormously from their initial focus on conservation into a broad and seemingly endless list of projects.

Constructive Conservation in Practice and English Heritage highlights the 20 best development schemes in historic places