Not being funny Jay, but the 'East' in 'northeastern' gives it away.
On the fence situation;
On a new property the buyer takes ownership of a fence from the developer, until it rots away and is replaced. After that the owner would be whoever pays for and erects a new fence. So, in your case, that could be the previous owner of your house, or it could be next door, or a previous owner of next door. Sometimes people go halves - in which case the fence would be jointly owned.
Ownership of the fence has nothing to do with (so-called) ownership of the boundary. The boundary is an imaginary line, of no thickness, between two properties. So, if you 'own' the boundary you don't really own anything, just the space that the boundary sits in (remember it has no thickness so that amounts to nothing really) The fence might run along the apparent line of the boundary but the owner of the fence is a different thing. Bear in mind that an owner of a fence is entitled to build it right up to the boundary.