I have to glitches in snow valley to show you. You may already know these but I dont believe anyone has released them.
The first one isnt that useful, but it is cool and you have to kill yourself to get out.
Go to the Bravo base that you would spawn in for CTF, the one with the tents. Go to the first tent the one farthest from the house. Go to the opening and crouch and move straight while going left and right. (you need to be looking toward the right a little bit.
After you get in, it should look like this :]
Second Glitch is a lot more useful.
Located here, either one of the walls near the tow ladders, the ones closest to me.
Jump up on the wall and walk out to the corner and spam crouch until you fall.
Once you fall turn around and face the shortest part of the wall, when it looks like this...jump in.
*What it looks like when you get in*