You come to a castle nearly the size of a mountain. On closer inspection, you realize it's made up of several castles from different regions jammed together without organization. The inhabitants have begun building passages between them. This is the Convoluted Kingdom.
The first portcullis opens automatically as you approach. You zoom down a passage and encounter another portcullis. When you approach the gaps in the bars, you are thrust back a few feet by some sort of electromagnetic force.