What you see is what you get: gridded geomorphic tiles designed to create uncountable numbers of different volcanic cave complexes. These tiles fit together terrifically with other e-Adventure sets to produce larger and/or more varied boards.

These are a miniatures gaming mainstay at our place: instant battlefield, just alternate placing tiles till the table's full enough, pick an edge and rush in. They could also be used by a gamemaster to create and then lay out a cavern complex.

The price point is slightly high, but it's worth it.