In my trade plating days (delivering cars around the country) one of my colleagues drove a vehicle to St Ives, Cornwall, when it should have gone to St Ives, Cambridgeshire. Another guy phoned head office from Kings Lynn to say that the town was bigger than he thought it was and he was having trouble finding Kings Lynn Ford. It turned out that he should have been in Kingswinford, in the West Midlands ;-)
I got stopped by a guy while walking along a street in Wymondham, Norfolk, who was looking for the firm where he was due to go for a job interview. When he showed me the company's letterhead, I saw that they were based in an office block, called 'Wymondham House', in Birmingham!
I've read of people booking the wrong flights because they've not realised that Dominica and the Dominican Republic are totally different countries, in different parts of the world.
When I lived in Ecclesfield (on the edge of Sheffield) Wentworth Woodhouse (on the edge of Rotherham) wasn't far away. Every time there was a major golf event on at Wentworth (in Surrey), visitors would call in at our local shop, asking for directions to the golf tournament!
This is my favourite story of people going to the wrong place though ;-)
https://www.bbc.co.uk/news/uk-england-birmingham-36150328