The Priory Church of St Mary sits alongside the castle on Castle Hill and is one of the finest medieval churches in northwest England. Founded as a Benedictine priory in 1094, little of the original Norman structure survives — the current building is mostly 14th and 15th century, and all the better for it.
The carved choir stalls are the highlight, dating from around 1340 and featuring a wonderful collection of misericords — tip up the seats to find carved monkeys, dragons, and domestic scenes. The Saxon doorway on the west side is the oldest surviving element.
Step into the churchyard for views over the Lune estuary and Morecambe Bay. On a clear day you can see the Lake District fells. Free entry, though donations are welcome.