Annapurna Circuit is a very famous trek that offers you a challenging experience and a lot of variation in landscapes. You will cross authentic villages during the trek what gives you the oppotunity to meet the local people.
The highlights of this trek are Muktinath (a Hindu-temple at 3800m altitude) , Tilicho Lake and crossing the Thorung La pass (5416m)
The extension to the Tilicho-lake gives an extra value to this trek: this high-altitude lake is hard to reach and less touristic.
While on city visit in Kathmandu you will see durbar square and the Buddhist temple Swayambunath (also known as “the monkey temple”). Bhaktapur is a quiet city in Kathmandu-valley, a protected world heritage site and well-known fot its pottery. Pokhara is a nice place to relax after the trek.
During your last nights in Nepal you will stay in Dadhikot, a peaceful village at the countryside. The new guesthouse there lies amidst the paddy fields