The cubic mountains were gigantic, cube shaped hills that existed in the Falluroust empire back when Asomiranz was still called Yinram. Thwy no longer exist, but historians have found that they were over a mile high, rising up from the ground at a perfect 90 degree angle. Due to their unique shape, humans of the time had never ventured up them. Geologists speculate that they are shaped like cubes because they were formed under similar conditions to Otherworld itself. All mountains in the chain have at least one volcano on top of them. These volcanoes would constantly spurt new rock from the inside of Otherworld on top of the mountains, making them grow bigger and bigger. It is speculated that they no longer exist due to this rock becoming too heavy and crushing the mountains under their own weight.