Places to visit in Zanzibar

Hi Julie,
The must see will depend on the interest of a person, however, if your friends are interested on cooking/food, they can visit the spice farm at outskirt of Stone town ,this visit will combine cooking class and spice tour, if at all you are interested on being less touristic you can be in the (public transport) dala-dala. tangawizi-restaurant.com
Secondly, Kendwa is a beautiful place to visit due to its magnificent beach, when visiting Kendwa your friends can have Kendwa village tour which is conducted by Kendwa people themselves, if you do not have someone to help you with this I can help you email [email protected]
If friends love nature here is what I recommend:
Dolphin tour
Jozani forest with red colobus monkeys
Safari blue with buffet in the local dhow
Half Zoo to view animals like pythons, bush babies, chameleons etc
Butterfly sanctuary
Prison island great place for snorkeling in town
There are more but I would love to recommend those.
Shara