Descending into the pit that leads to the Arnold Ice Cave entrance.
A view from atop one of the lava pits near the trailhead.
Staring into the abyss and sizing up the ice flow into the cave.
Preparing a safety line for the icy descent.
The frozen water for which the cave is famous.
Many sections of the tube are covered with piles of lava rocks from previous collapses.
Going around one of the cave's many turns.
They're called ice nubbins. Water drips constantly from the cave ceiling, freezes when it hits the ground, and builds ice stalagmites.
The entire cavern is filled with hundreds of these!
Ice nubbins illuminated by the camera's flash.
The ceiling has a unique gold algae growing on it.
A section where the cave narrows and visitors can crawl or power-squat and walk.