A giant pit
Pit latrines are supposed to be three meters deep and one meter across. The hole in the floor size should not be as big as this one because people could fall in. If you are thinking of digging a pit latrine, you should consider that it may not smell good.
If you weren’t planning to dig up a pit latrine but happened to discover a giant hole in your garden, you should start panicking. Maybe the Earth is collapsing and lava will emerge, or maybe thieves are digging a tunnel to get into your home.