rabbit burrow
rabbit hole

He'd better get used to being down the rabbit hole.

In the low bank behind him were three rabbit holes.

Certainly nothing much good could have happened down this rabbit hole.

What a rabbit hole that had turned out to be.

Talk about going down the rabbit hole on that one.

"Bill went down a rabbit hole and came back out."

Move out into the country, go back to living in old rabbit holes and eating whatever we can find.

There was no bottom to this rabbit hole, only the end of the world.

There is no need to fear putting your hand deep into the rabbit hole.

He'd gone down the rabbit hole and left no trace.