Acclimatization is necessary before exploring Ladakh. But acclimatization does not mean sitting idle. Roam around in Leh (3,452 meters).
For example, you can visit Ganglas / Gangles during acclimatization period in Leh, the entry point to Ladakh.
Ganglas (3,800 meters), about 12 kilometers from Leh , sits by the side of the Khardung La highway. Lateral moraines can be spotted around the village. The Ganglas Chu, a mountain brook, freezes in December. Indian Army built a micro hydro power project (4,091 meters) at Ganglas, probably the highest hydro project, to meet its power needs.
Have a look at the village: