What land forms appears on caverns?

Oooh, they have their own special range of "land-forms"; passage profiles, chambers, erosion features not seen in surface water-courses, stalactites and stalagmites, particular sediment deposits....

I suggest you look on-line or in text-books for photographs of caves. Those in show-cave publicity are a good start provided they are taken by genuine cave photographers who can do the cave justice, and not simply collections of visitors' snap-shots. Caving-club web-sites might hold some good photos too.