Introducing the first official map out of exp for 6.0 and into live! Fertile Caldera is based off of an extinct volcano, with various ex human stations where they used to study the volcano's history. The soil houses lush possibilities, and remnants of ancient magma tunnels remain, what is left from water/wind erosion helps access the majority of the caldera. You start at the top of the oldest peak before the magma chamber died down, and looking down your beavers can see a variety of materials/possibilities for your beavers to harness.
But sometimes this volcano still shoves out a nasty surprise, and it's up to you to prepare for the future by securing your beavers and keeping them comfortable.