There is of course Grenoble, the famous “capital of the Alpes”. Grenoble and its mountains, its museum, its Bastille and its cable car known as the “bulles” (meaning “bubbles”, named for its round pods). With some 155,000 inhabitants, the prefecture of Isère is by far the largest and best-known commune of Isère.
A little further north, Vienne has no shortage of attractions. Museums, a Roman theatre and many historic monuments: so many places to explore with family or friends, for a weekend or an afternoon.