https://huggingface.co/spaces/akhaliq/depth-pro
For some pictures it outputs something reasonable, for others it's completely broken (black with colored noise in one area).
https://en.wikipedia.org/wiki/Parthenon_Frieze
(Exaggerating a bit. Ancient Greek reliefs do have sculpted detail on the underside, e.g. the horse legs come slightly detached from the surface. So they are not 100% depth maps.)