Situated on a major road and beside a navigable river, Telen is more than a castle, it's a complete settlement within a partial wall with all the teeming life that you might imagine.
Replete with details from the local lord's amorial bearings to the history and economics of the township, everything you need to make it come to life in your alternate reality is here. It's a market hub, they quarry stone and it is an administrative centre for the region. Plenty of reasons for your characters to visit or at least be passing through - and there is enough going on here to keep them occupied should they wish to get involved.
There is a detailed map for the GM, keyed to a list of significant locations, as well as a full-page player map. Map enthusiasts will enjoy the maps of the surrounding area as well - all geographically sound complete with an ox-bow lake that provides part of the settlements defences (and probably some fish as well!).
It's a splendid detailed resource, with that air of reality that lets you picture the place bustling away with or without your characters.