Just 15 miles north of London, Watford developed as a market town predominantly as a result of travellers heading to Berkhamsted Castle and the royal palace at Kings Langley. In its later history, Watford became strategically important because of both the Grand Junction Canal and the London and Birmingham Railway.
The town has a history of brewing until the late 20th century. Now, Watford is an urban district in Hertfordshire providing commuter territory to London. Now it is probably most famous as a destination for Harry Potter fans coming to see the studio tours at Leavesden.