Ice Cave Structures

With the upcoming Ice Caves, I think it would be cool to have various structures which can spawn inside large chunks of ice under ground (or above too) with different things, like frozen mammoths (would need blocks of meat or smthn thst can be cooked or turned into smaller meat like steaks), frozen trees (with frosted leaves and frosted wood + new frozen wood type), or other things like small ancient civilisation-esque buildings.