From the back of the book:
"The Bones of Vanquished Empires Beckon
Your tabletop never looked better! With Dungeons & Dragons Miniatures and this pack of customizable terrain grids, you can add a new dimension to your D&D adventures. Easy to set up and infinitely expandable, this pack allows you to create the wilderness adventures you want to play. Pick up additional packs to create larger, more elaborate landscapes!
This pack contains six durable, fully illustrated map grids, featuring wilderness locales, ruins, rivers, and other terrain elements that you can use to make great D&D encounters that enhance your roleplaying game experience.