You'll enjoy the restaurants and monuments in New Manali. You might want to make time for a stop at Tibetan Monastary or Mall Road.
Though Bhagsu Nag might not have many top sights, you can venture to the surrounding area to see attractions like Bhagsunag Waterfall and Tushita Meditation Centre.
Though Knollswood might not have many top sights, you can venture to the surrounding area to see attractions like Jakhu Temple and Mall Road.