There are many maps showing areas disputed between India and its neighbors. This is perhaps the most comprehensive. It appeared in the “Economist” some years ago.
Though you may find this more convenient:
Note that nothing much had happened in the past in the “central” portion, where China borders Uttarakhand and Himachal Pradesh. Now Chinese troops have started intruding there as well-apart from the better-known Barahoti in Chamoli district of Uttarakhand, there are also reports from Kinnaur district of Himachal Pradesh.
This map of Himachal Pradesh shows the districts:
We can see that Kinnaur and Lahaul-Spiti districts share borders with China.
Now see this map of Kinnaur district:
Incursions have been reported in the vicinity of Sumdo.
Here is a Google Maps extract showing the border post of Kaurik:
Unlike in the case of most of our northern borders, roads seem to exist to within a few km of the border here.
A longer list of disputed areas can be seen here:
If you are really into maps, you can amuse yourself by accessing Google Maps from google.co.in and other sites such as google.com. The latter will show a lot of “disputed” sections which do not appear in the former. Try it especially on the Uttarakhand and Himachal borders, besides the better-known disputed territories in Arunachal Pradesh and Ladakh.