Greetings! Was fooling around with a friend just now and I got curious about a few things. It turns out 2 areas (or more?) allows you to reach offmap areas (or death zones actually)   Here's 2 GIF videos about it 

1: https://gfycat.com/GrizzledPoorArctichare

2: https://gfycat.com/QuickSelfishCaudata

Have a nice day!

I will send more if I ever find other places like that and sorry in advance if you guys are aware already. :)