Bra is the home of Slow Food, and an interesting city to visit in itself. Cherasco is know in part for its chocolates, fill up at Giancarlo Torta's Barbero di Cherasco chocolate shop. It's also known for its gigantic snails, a gourmet treat.
The town of Barolo itself is delightful to walk; go to the castle and take the tour or get information on self-guided tours of the region.
Serralunga d'Alba has a fine restored castle, from which the views are spectacular. There are restaurants right along the road, so you can park and eat a quick meal here if you wish.
A good place to stay with panoramic view and famous restaurant is Albergo Le Torri in Castiglione Falletto. Chef Maria Cristina holds forth at Le Torre Ristorante, and holds cooking schools for small groups at the restaurant.