Hua Mountain Quarry

29°44'37.72"N, 118°23'1.63"E

Also known as the Huashan Mysterious Grottoes (link: NA)

Location

China, Anhui, Huangshan City, Tunxi District, 001 County Rd,

Hours
everyday 8:00 - 17:00

Phone
+86 559 235 9888

Site not yet visited, but the online images appear to look like the Longyou Grottoes. You can also checkout this link for more details: https://eugene.kaspersky.com/2017/11/02/the-mysterious-grottos-of-huashan/