Please see below links to local attractions.

Cawsand - Plymouth Ferry.   A regular ferry service to Plymouth from Cawsand beach which runs throughout the summer
It's worth it just for the trip which gives views of Mt Edgecombe, Drake's Island and 
                                                        Plymouth Hoe. (ferry is 2 mins walk from accommodation) 

Mt Edgcumbe Country Park   A vast park which has stunning gardens and walks. Entrance is free apart from the house.
                                                                   Cawsand and
Kingsand are within the boundaries of the greater park.

Rame Peninsula.                     A highly recommended site with some excellent photographs of the area.

National Marine Aquarium.  One of Britain's finest aquariums with the deepest tank in the country. Situated on
Plymouth Barbican very near to where the Cawsand Ferry lands. 

The Eden Project.                                          Cornwall's premier tourist attraction. Has the worlds largest greenhouse (34 miles from Cawsand).