The Museum of the Mountain Troops sits inside the Bastille, which already gives it one of Grenoble's most dramatic museum approaches. Its subject is the French alpine military tradition: soldiers trained for snow, altitude, cliffs, and mountain warfare rather than parade-ground neatness.
The museum is compact, but it pairs naturally with the cable-car ride and the Bastille viewpoints. If you are interested in how geography shapes armies, this is more than a display of uniforms; it explains why the Alps demanded a particular kind of soldier.