Time Trap (2017)

Originally published at: https://timetravelinstitute.com/ttidb/movie/time-trap-2017/

A group of students becomes trapped inside a mysterious cave where they discover time passes differently underground than on the surface.

I watched this again over the weekend and it holds up great. I paid a little more attention and got more of the story, but the time ladder that wiggles like hollow aluminum is still distracting.

Definitely worth a watch. They play with people jumping in and out of the influence of the time portal to interested effect.