Anish Kapoor cut a hole in the floor and coated it in a pigment so it looks like a shape on the ground, not a gaping void. Descent into Limbo has lived at the Serralves Foundation in Porto since 2018, and Kapoor has never filled it. It’s like Wile E. Coyote’s painted tunnel, but real, and in a museum where several visitors might fall in (and at least one has).

It’s a strange thing to call an object, yet here we are. The hole doesn’t reflect light, hold weight, or occupy space — it just takes. And nothing anchors a collection quite like an absence. Save it to Cosmos and see what else looks right in its orbit.