I studied English for 2 months in Torquay in the county of Devon on the South Coast in 1995 and 1996.
Two must sees are Cockington Village and Kents Cavern.
It was a perfect town to study in, I had never been to England before and was really suprised to see palm trees and long, nice beaches! And to have nice weather all summer, I was prepared for rain :)
Dartmouth is not far from Torquay with a beautiful landscape with valleys and cliffs, perfect for a weekend trip.
Actually I wouldn't mind returning to study at the English South Coast (maybe Bournemoth University). The only problem is for my boyfriend to find a job, he is a Software Engineer, so if anyone knows anyone, wo knows anyone.... Send me an e-mail! :)