In stark contrast to the Eloi cliff dwellings are the tunnels
inhabited by the dreadful MORLOCKS.

Separated in a caste system of Spy and Hunter Morlocks, they live
in a chaotic maze of underground tunnels and harsh industrial
caverns. The ominous network of passageways and foul, fetid chambers is filled with rough-hewn tools, hanging chains, rotating
rods, gears and other mechanical devices that have a grisly purpose
in the hands of the Morlocks.

Looking down on the art departmnet model showing the Morlock underground complex