Here is a possible itinerary for a 7-day trip to Ladakh:
Day 1: Arrive in Leh and acclimatize to the altitude.
Day 2: Visit the Shanti Stupa, Leh Palace, and Hall of Fame Museum.
Day 3: Drive to Nubra Valley and visit the Diskit Monastery and Hunder Sand Dunes.
Day 4: Drive to Pangong Tso and spend the night on the lakeshore.
Day 5: Drive back to Leh and visit the Thiksey Monastery and Hemis Monastery.
Day 6: Visit the Lamayuru Monastery and Alchi Monastery.
Day 7: Depart from Leh.