Best Cornwall Attractions Best Cornwall Attractions The Eden Project The Eden Project is the largest indoor rainforest in the world. The Minack Theatre The Minack is a unique theatre perched on the cliffs high above the Atlantic ocean. Tintagel Castle Said to be the birthplace of King Arthur, with a history going back to Roman times. Land’s End Land’s End is Britains most south-westerly point, and a famous landmark. St Michael’s Mount An amazing castle-topped island, steeped in myth and over 1000 years of history. Lost Gardens of Heligan One of the most popular botanical gardens in the UK with a great variety of plants.