What is this yellow diamond symbol on my map?

I started playing Borderlands 2 the other day and a symbol came up on my map while doing the "Note to Self-Person" quest, where you find the stash of the goliathe in The Fridge. The symbol shows a stick-figure person like the ones you see on a bathroom door. It is in a diamond and it is yellow. What is that?

I searched the area, shot a around, tried to open things, melt ice with a flame weapon but it didn't help. I'm just baffled.

I've searched for answers to this question and came up empty handed. I have no idea what this symbol is. I've never seen it before. I have picture of it if anyone wants to see.