The top image shows the entrance and its environs, the second shows the scale.  Note the line of ice stalagmites under a fault in the ceiling.

Three different years of ice formations in the entrance room.   In the last picture (the oldest) a leaning wooden pillar is visible on the left next to the large ice formation.  It has since disappeared.

These three images, taken over a span of years, show the increasing depth of the ice in the tunnel in the back of the entrance room.

About two-thirds of the way to the next room, the winch room, an obstruction is encountered.  The picture on the left is the older, the one on the right was taken in September 2004.  This material falls down a crevice in the roof of the tunnel, and the amount of blockage varies from year to year.

This is the obstruction from the other side.  A visitor can be seen crawling out on the left.