Nashik is full of Temples, Ghats & Forts...
1. If you are found of trekking i should say Must visit Harihar fort & many others like Anjenari, Anchala, etc.
2. Nashik also have bunch of Temples with great architectural significance like Vani temple, Trimbakeshwar temple, etc
3. If u are travelling from pune ... prefer naneghat & malshej ghat route