I stumbled upon Catharsis while they were disassembling it, so this is probably just the frame of the structure. I wish I had found it earlier!

Catharsis Project / Antematter by Mamou-Mani - mamou-mani.com/project/catharsis/

Catharsis is a fractal gallery for our infinite dreams. It welcomes all arts and performances in the spirit of radical inclusion and self-expression, acting both as amphitheater on playa and a travelling museum for burners around the world. After the event, it will be re-assembled in other cities. Catharsis is a physical representation of the hyperbolic space. It is a three-dimensional representation of a geometry that could only exist in an another reality – or does it? This infinite space, has seven gateways elevating to the sky and getting increasingly intricate and intimate, forming a dream-like set of galleries and performing spaces for everyone to use and place art of all kind.

Photo taken at the Burning Man 2022 festival (Black Rock Desert, Nevada).