If you loved Beyond the Poseidon Adventure, try Voyage to the Bottom of the Sea
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Irwin Allen, and they sit in Adventure / Drama territory. If that's the register that drew you to Beyond the Poseidon Adventure, the second film will land in a comparable space — through a different lens.
What Voyage to the Bottom of the Sea is
Atomic sub commander fends off boiling oceans and giant squid while Washington bickers about climate control. A 1961 Irwin Allen safari under the waves rides atomic dread to vintage pulp glory.

