Adromedi Jungle Observation Tower
From Jenny Everywhere Wiki
In one universe, the Adromedi Jungle Observation Tower was an ambulatory, 500-stories-tall glass tower. It was built by the locals to keep track of the Adromedian Jungle, which was itself a wandering jungle. The Observation Tower was one of the first locations outside her home universe which Briar saw after she began travelling with Century Smith. (PROSE: Century Smith and the Time Terror)