I love that the wall of caveworks look like drapelites. I love the risers giving multi-level caves. However, as a science teacher that does a unit on caves, a citizen of Missouri "The Cave State", and a frequent cave tourist, I missed these following features.

1.) Columns! Natural ones forming from stalactites and stalagmites meeting. A variety of heights, some columns can be quite tall.

2.) Flowstone. Easily the most common cave formation, they look like melted wax (which is what I'm intending to use, BTW.) They often form mounds and such.

3.) Soda staws very thin stalagmites. (I intend to use swizzel sticks, y'know, the things you stir coffee with.)

4.) A big lake tile (s). Many caves have them (they're formed by water doncha'know)

5.) A sinkhole, another common cave feature.

6.) Some method of making a shaft. I could easily see a scene of PC fighting giant cave bats as they tried to climb up or down a shaft.

7.) Other interesting formations would be nice. I could get you a list of website with some, if you like.

Thanks for the great set!

d20fool