A Stone’s Throw

Example: 

Stephane:  I’m looking for the emergency clinic.  Someone told me it was pretty near.

Sean: It’s a stone’s throw away.  You see that building fifty feet away?

Stephane: The pink one?

Sean: That’s the one.  Just next door.

Stephane:  Wow, no kidding! It really is close.

Meaning: "A stone’s throw" means a very short distance; In other words, as far as someone can throw a stone.   Most people can’t throw something very far, so when this expression is used, it typically means you’re within sight of a location, thing, or person you’re looking for.