The Quantum Cave is a final year BSc (Hons) Architecture project from the University of Bath, focussing on creating a space to encourage communication between humanity and Sentient AI by manipulating perceptions of the Numinous and Sublime. Positioned on Abbotsbury Castle hillfort near Dorchester, UK, the building is designed as an environmental entity built out of materials found on site and positioned to optimise its position and aspect within the land and towards the sea. The hall of communication contrasts with the strong numinous natural aspect; this results in a more human-scale AI interaction space to help reduce feelings of the uncanny.