Must do, highly recommended
 

The Eden Project

The Eden Project was established as one of the landmark Millennium projects in the UK to mark the year 2000 and is structured as an educational charitable trust.
The Lost Gardens of Heligan Heligan, seat of the Tremayne family for more than 400 years, is one of the most mysterious estates in England.
St Michael's Mount Magical rocky island crowned by medieval castle and church.
National Maritime Museum Housed in an award winning building on the Falmouth harbour-side, the National Maritime Museum Cornwall transports you into the world of small boats and Cornish maritime history