A SUN article on a mass killing site, Khasfa sinkhole, in between the town of Hammam Al-Alil and West Mosul:

https://www.thesun.co.uk/news/2967802/chilling-images-reveal-inside-biggest-mass-grave-in-iraq-where-isis-buried-bodies-of-thousands-of-enemies-in-400m-deep-sinkhole/