Are you familiar with the term phrogging? Is it possible someone is secretly living at the resort and that was what you heard? Is there anything preventing random people from sneaking in at night?
I think morbid curiosity is not weird, people rubberneck at car accidents. What you are describing sounds like it is going beyond a passing interest though, and the further you go down that rabbit hole, the weirder it will be.
Since you’re asking, it might be a good idea to talk to a professional. You might also consider getting into something like an extreme sport.