It covered hundreds of kilometres in the Pacific until one day it was washed up on the beach.* Our driftwood comes in many different shapes. In the rainforest biotope it provides the characteristic jungle atmosphere in addition to the tropical plants.
Don’t worry the Driftwood is cut for the opening of the Baiosphere, so that it simply fits into it.
*all descriptions of origin are fictitious and originate from the fertile imagination of our baiosphere intern.