On a Saturday morning, a friend and I took a train to the neighboring city of Durham. The ride is about 20min and is a great option for a day trip from Newcastle. You can buy train tickets in advance [EastCoastTrains] and pick them up at the station.
Durham Cathedral was used as a filming location in some of the Harry Potter films. That may or may not have influenced my decision to visit. Yes, I am a Potterhead.
The original blog post on my visit can be found [here]. Also, here is a link to Durham Cathedral’s website.