Tourist sites in Isère: La Balme-les-Grottes
Dare the interior adventure... Rare and exceptional natural site, the Caves of La Balme offer an atypical outing for the whole family in the heart of the underground world. The Caves of La Balme are located 35 minutes from Pont-de-Chéruy and 25 minutes from Montalieu-Vercieu with regional buses!
More information on their website
And if I go by bus ?
Take the line T21 Bouvesse-Quirieu - Pont-de-Chéruy and get off at the stop "Mairie" in La Balme-les-Grottes.