Royal Cornwall Museum, River Street, open Mo-Sa 10am-5pm, last admission 4.30pm, tel 01872 272205, free admission - includes the Courtney Library and exhibitions devoted to the history, culture and geography of Cornwall
Have High Tea at Charlotte's - In a Victorian building on the main shopping square in Truro, Charlotte's, on the second floor, is a step back in time. The tea is Cornish grown as well!!!.
Attend a performance at The Hall for Cornwall- a wide variety of music, theatre, and dance productions rotate through the Hall for Cornwall continually. Its a regular stop for National Theatre productions. In downtown Truro, the signs are easy to spot.
Watch a film at The Plaza - Courtesy of WTW Cinemas, opened in 1938 and now with four screens 
Good number of shops including a rather large Marks and Spencers.
Pippa's - Steakhouse, fantastic food at reasonable prices, child friendly and lovely atmosphere