Everyone at first said it was a beanstalk. That is not a new theory. I think i just thought that the camera might get up in the hole and that was why it was green. Also since the hole is fake. Like they made a fake looking hole that is set on top of the real street that is not broken that might explain why it is raised. For practicality sake. Though either way. And Emma and Snow could have vanished some other way. It doesn’t have to have been this hole.