Best locations for sneaky kills?

I stick near walls, or sharp corners and use smokes to get knife and "surprise ganks" to say.
Anywhere where there's a depression in the wall, you can use and abuse it for your benefit. As long as you have a smoke and know when to use it, you're pretty much guaranteed to be safe and get a few picks, as long as it's not terribly overused, or there's not someone from the enemy team trying to get into the same spot as you lmao.