The Mountains of Despair compose the last leg of the journey in the Logical Journey of the Zoombinis. Like all the regions, it is three puzzles long: The Lion's Lair, the Mirror Machine, and Bubblewonder Abyss. After these last tests, the Zoombinis reach Zoombiniville. This part of the journey is the most dangerous part, causing much depression for the Zoombinis along the way, which is why it was named the Mountains of Despair.
This is a mountainous region. The safest way to travel through it would be in the mountains themselves. Zoombiniville is surrounded by many hills. And is a grassy region.
There are bats that live here. A long time ago there used to live an ancient civilization that became extinct but left archaeology.