Marvelous misadventure

You ready yourself and jump to the first rock, then the next. So far so good. On your third jump, your paw slips, but you are able to recover. The last step is an easy one and as you go to stick the landing, the rock dissolves into 76 gems. You slide down the whirlpool in one thrilling swoop, the guide jumping in after you looking unworried by your descent.

Under the whirlpool, a waterfall floats you into an underground lake. As you pull yourself from the frigid pool, an icy palace opens before your eyes. Thick layers of ice coat the cave's interior and ornate carvings decorate the walls. Your guide stands on the shore, shaking out her fur.  She inspects the surroundings, and you do the same. You realize there is no discernible exit, though some of the ice looks thin and even cracked in some spots along the walls.

What do you do?