What lurks inside a black hole with no singularity?

Hayward black holes replace the central singularity with a smooth core, but their interiors are still geometrically wild. Mapping out the trapped surfaces — boundaries where even outward light is pulled inward — reveals self-intersecting pairs that appear or vanish depending on a single parameter, and near the inner horizon their locations are governed by hypergeometric functions with a continuous (not discrete) eigenspectrum. That last point is unusual and signals that the inner horizon region has fundamentally different structure than standard black hole interiors.