Chamonix vs Dolomites

Also, we'd be going mid-June 2025. Would Dolomites be less busy than Chamonix during that time?

To my odd way of thinking, the Dolomites and Chamonix are like chickens and pheasants. They are both birds, but that's the only thing they have in common. The Dolomites and Chamonix are both very scenic. Beyond that they are very different. If the kids liked the Dolomites, they'll love Chamonix. Especially if you take the cable car up the mountain.

I would assume from your question that you're not a geologist.

If that assumption is true, taking the téléphérique from Chamonix and then taking the other on to Helbronner in Italy gives you and your children an opportunity to see a variety of alpine glacial landforms up close. It's a fascinating journey and one that is possibly unique in the world.

But.

But -- you have to educate yourself first so you know what you're seeing and are able to describe it to your kids. The cirques. The crevasses. The horns. The sharp ridges. The needles. They're simultaneously beautiful, treacherous, and informative, and you can see them all from a small car suspended on a cable with virtually no effort on your part; unlike the mountaineers you likely will see below you like ants on the snow and ice.

And the l-o-n-g walk down to the ice cave carved out of Mer de Glace glacier, passing signs that denote where the glacier was until very recently, is a powerful lesson about how the climate is changing and how alpine glaciers are responding to that change.

It's a powerful educational opportunity among some of the most beautiful mountain scenery the world offers.