Take the morning drive to Kaza, the capital of Spiti. Visit the Ki Monastery, the largest monastery in the valley, in the afternoon. In the evening, explore the local market and try some local cuisine.
Visit the world's highest post office in Hikkim in the morning. After that, head to Komic, the highest village in Asia, and visit the Tangyud Monastery. In the evening, enjoy stargazing in the clear skies of Spiti.
Visit the Dhankar Monastery and Fort in the morning. After that, hike to Dhankar Lake. In the evening, explore the village and interact with the locals.
Take a morning drive to Pin Valley National Park. Visit the Kungri Monastery and take a short hike to the Pin Valley to spot some snow leopards. In the evening, return to Kaza for some rest.
Leave early in the morning for Chandratal Lake, one of the most beautiful lakes in the Himalayas. Take a short hike around the lake and enjoy the scenic beauty. In the evening, camp near the lake and enjoy a bonfire.
Take a morning drive to Manali via the Rohtang Pass. Visit the Hadimba Temple and explore the local market in the afternoon. In the evening, relax at your hotel and enjoy the views of the Himalayas.
In the morning, head to Solang Valley for some adventure activities like paragliding, zorbing, and skiing (depending on the season). In the afternoon, return to Manali for some last-minute shopping. In the evening, take an overnight bus back to Delhi.
You can also consider visiting the Tabo Monastery and the Langza Village. You can maximize your fun by trying out the local cuisine, interacting with the locals, and trying some adventure activities in Solang Valley. Don't forget to carry warm clothing as it can get very cold in the Himalayas even in June.