Yeah...if you're talking about the "question marks that need to be aligned a certain way" stuff, there's maybe 10 in the game you've gotta find. For the caves, you need all the equipment [well, mostly the zipline] --- Live by the foma that make you brave and kind and healthy and happy http://mantlenotmouse.blogspot.com/
you don't need any equipment for "A puzzle has many sides, but only some are visible." It just hard to find. I think its near the second level where there is a ledge where you jump and grab onto and move around it until the opening. There would be a riddler trophy inside and when you turn on detective mode, you would see the riddler's "?"
ok, took me ages,but i found it. it is on the under side of the bridge you climb up to at the end so you can zipline to the pump control room. the way to get at it is walk to the end of the bridge(away from the control room)look dwn and drop to the stone platform underneath,shimmy around the corner and then look across in detective mode, the dot in o the little wall in front of you and the ? is across under an arc in the bridge. Hope this works for yas koz i was ecstatic when i finally found it
I think the most annoying one was "What is invisble if its right in front of you" or whatever it said, the penetentiary one that was in the guard room. Because I totally forgot when I first encountered it that you get the zipline, so I was like how the hell do I solve this one.