4. Brownsea Island, Dorset
Getting to Brownsea is an adventure in itself. You have to take a boat to get there and once you reach the place, it feels like a different world altogether. Set in the middle of Dorset’s Poole harbour, the island seems to have everything from freshwater lakes, lowland heath, beaches, ponds and a lagoon to reedbeds, an abandoned village and wet meadows.