High Tower, otherwise known as Doza Tower, stood tall on the Colossus, which was a fueling station situated on the ocean world of Castilon. This tower was viewed as a high-end, desirable location, leading the majority of Colossus residents to aspire to reside there. Inside Doza Tower, one could find the Aces' Lounge. Captain Imanuel Doza's office, along with the Colossus' previously abandoned command bridge, were both positioned at the summit of the tower. Following the Colossus's launch into the cosmos to evade the clutches of the First Order, Doza brought the command bridge back into service.