>>213963172 (OP)
There was a recentish low budget horror where this guy inherits a home from relative crazy uncle or brother, and in his basement there's a hole that leads to a cave and there's something living down there. It was pretty good and suspenseful. Simple story decently executed. For the life of me I don't remember the name and searching for it does no good. It felt like it was inspired by early 1900s short stories on subterranean horror. Just one character in the whole thing as I recall, the protagonist.