Three days in cornwall... advice needed

In Penzance, the Admiral Benbow is worth a visit, unlike pretty much anything else in that town (sorry hillbilly).

Oh and one other thing - fuck the eden project, head for the lost gardens of heligan instead.

If you're looking to go down this way, heed what Mashton wrote - the Benbow is a good pub - it's proper. And a bit odd too. The lido is just down the road too and is worth a look even if you're not into swimming.
And Heligan is fucking brilliant. Take a picnic, smuggle in some booze and spend the day there, it's really worth a visit.