That’s “Wild Man Cave” in Chinese. It’s an inscription near the entrance of the “Yeren Cave” in Western Hubei Province, China.

Known variously as the yeren, wild man, man-monkey, and man-bear, a huge red-haired hominid has been sighted at least 400 times in Hubei since the 1920s. In recent years the Chinese government has even begun distributing posters and funding scientific expeditions.

Maybe it’s just a legend, or maybe it’s a new species of orangutan. Or maybe it’s a remnant line of a giant ape that lived in these very mountains until about 100,000 years ago. Gigantopithecus was the largest ape that ever lived, three times the size of a gorilla — and its bones are still found in local caves. Hmm.