There’s a small but old town 15km from Amsterdam, called Muiden, in fact it is older than Amsterdam, that has a well-preserved medieval castle dating from 1296 called the Muiderslot (Amsterdam did not get city rights until 1300). It has a long and well-known history, tied to Muiden and its river the Vecht and everyone in the Netherlands has been on a schooltrip over there in their youth.
Then, a few years ago, all of a sudden the Muiderslot was being advertised as “Amsterdam Castle” with trips going there from the center of Amsterdam, while the castle is clearly not in Amsterdam and in no point in the history of the castle it was related to Amsterdam. :weary: