Brownsea Island sits in Poole Harbour, a nature reserve of heathland, woodland and an internationally important bird lagoon, and the birthplace of Scouting, where Baden-Powell held his experimental camp in 1907. Its most famous residents are the red squirrels, one of the largest colonies in southern England, though visitors also spot spoonbills on the lagoon and seals from the shore. Volunteers with telescopes often staff the bird hides, a squirrel-themed agility course keeps children busy, and free introductory walks and the Squirrel Shuttle mini-bus run when volunteers allow. The Villano Cafe serves pasties and sandwiches, and there is a beach on the south shore. Dogs are not allowed except assistance dogs. Reviewers allow three to four hours and recommend sturdy footwear on the uneven paths. Tips from regulars: everyone, members included, pays the ferry fare from Poole Quay, the crossing takes about 20 minutes, the last boat back leaves late afternoon so plan your loop, and an early ferry gives the best chance of squirrels.