“Explorer Woman Ray” (1989) IMDb
Young twins bring an artifact to a female archaeologist at a modern South American dig. The archaeologist competes with a team of ruffians under the leadership of a caped entrepreneur to settle the fate of the secrets of the ancient Ord, a civilization whose monstrous god ate the light of the sun.
Pulp archaeology in the vein of Raiders of the Lost Ark (1981) in a massively improbable setting. An optical illusion in the scene of the villain’s introduction helps make him very silly. Also, it never gets Lovecraftian, despite the blurb. Still, a pretty decent—albeit kitschy—feminist and Nazi-less Jones clone with a bit of Castle in the Sky (1986) thrown in.