What key has legs but can not open the door?

Question

What has wings,
But can not fly.
Is enclosed,
But can outside also lie.
Can open itself up,
Or close itself away.
Is the place of kings and queens,
And doggerel of every means.
What is it upon which I stand?
Which can lead us to different lands.

Answer 1

A Monkey.

Answer 2

A dog or any animal who have 4 legs