|Spoiler Alert! This section describes a subject that is sensitive to plot development.|
The Ice Cavern is the place where Sheik teaches Link the Serenade of Water, the song that can warp him to Lake Hylia, more specifically to the entrance of the Water Temple. The Iron Boots are obtained here. Link needs them in order to enter the Water Temple.
The Ice Cavern is - as its name suggests - a cold place mainly composed of ice. The dominating colors are therefore blue and white. The dungeon has only one level and a handful of small caverns (similar to rooms in other dungeons). Two caverns are never right next to each other. There is always a small corridor between them. They branch out to each other, mostly from one center cavern. From that center cavern is where the other ones are.
Inside the Ice Cavern is a lot of Red Ice, sometimes with items inside (chests can also be found trapped inside). Blue Fire, which is used to melt Red Ice, is found here. This dungeon is the only place where Link can get Blue Fire for free, besides Gannon's Castle. Other sources are shops. The icicles hanging from the roof fall down when Link is under them, possibly hurting him.
The following enemies are present in the mini-dungeon: