I've heard (a long time ago) that there is a "glacier grotto" that many photographers visit for stunning ice/cave images. If memory is correct it's in Engadin.

I'm hunting the web to find it bur I'm not finding exactly what I'm looking for. Anyone know of such a place.

Thanks

There us one in Saas Fee/ Valais on top of Allalin

https://www.saas-fee.ch/en/mountains.../ice-pavilion/

If it is in Engadin you're probably looking for the Morteratsch glacier near Pontresina.