A classical example of an event boundary is passing through a doorway, whereupon the person oftentimes forgets what was the reason for entering through a doorway. For the mind, the passing over of this boundary creates a definition between what was and what is now. Liminality is also a term that is associated with rites of passage, where the participator no longer holds the pre-ritual status, but the post-ritual status is yet to be achieved.

Liminality is a state of fluidity, where old orders and meanings of things no longer hold true, and the orders and meanings are yet to be established and are a space where these can be created. Maybe the intrigue of the liminal spaces, the exhilarating yet also terrifying, could be explained by the event boundaries.

Maybe the images hold elements, like a building with an uncertain fate, or what lies beyond the horizon of the forest, are thresholds for the brain to compile information and ready to assess what is coming next. Looking at these images that seem to display liminal spaces stuck in this state where the journey to new information has just begun but has not yet reached wherever they would lead leaves the brain in a state of constant wondering. This is just my interpretation and not saying it's an actual scientific consensus!