park barn

1. Anywhere that nobody really knows where it is.
2. Any unspecified location that can be referred to as where something is.

A: Where's the gig?
B: Park barn

A: Where did I leave my keys?
B: Park barn

A: Where did these barn eggs come from?
B: They're park barn eggs.

A: How do I get to London?
B: Take a left at Park Barn