Here in 1886, in the Grotte de Spy or the Betche aux Roches cavern, Maximin Lohest and Marcel de Puydt found two nearly perfect Neanderthal skeletons (man and woman) at the depth of , with numerous implements of the Mousterian type.
In 1886, within the Grotte de Spy or the Betche aux Roches cavern, Maximin Lohest and Marcel de Puydt discovered two exceptionally well-preserved Neanderthal skeletons (male and female) at a depth of , accompanied by numerous Mousterian artifacts.