It was hard to actually take photos inside the caverns because it was pretty dim and dark most of the time. Every so often, some parts of the cavern were lit fairly well, and were close enough for the flash on my camera to actually illuminate things well enough for things to be clear! The image, above, gives you an idea of what the various openings in the cavern walls showed you.
These sort of icicle looking formations are called stalactites when they form from the ceiling of the cavern (they hang "tight" to the ceiling) and stalagmites when they form from the floor of the cavern (they are "mighty" and reach to the ceiling). When the two of them meet, they then form a column. Here are a couple that are almost a column. They are actually only about a few feet from each other. It will probably take them quite some time to meet tho.