Unreal Editor: Test Map, Where's the Kill Zone?

Hey, I’m pretty new to this whole engine thing. I launched Unreal Editor and was greeted with a testing map.

When I jump off the map when play testing, I died, as to be exspected. But when I inspect the area, I noticed there’s no volume for kill zone. That border that kills you on contact. Not too familiar with the terminologies yet.

I first assumed death borders were a default thing for new levels, so I checked some blank levels, and jumps off. Just to see that I’m falling off into infinite void.

So, what kilss off the player on this test map if it’s not a kill zone?