If you loved The Descent, try The Descent: Part 2
A bridge between a film you've already seen and one most people haven't. The Descent: Part 2 has roughly 3.4× fewer votes than The Descent — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theysit in Adventure / Horror territory. If that's the register that drew you to The Descent, the second film will land in a comparable space — through a different lens.
What The Descent: Part 2 is
Deep within Appalachian caves, a pickaxe lies still. A rescue team assembles, a traumatized Sarah descends again. Harris sustains the claustrophobic dread.

