Filming for "The Union" mostly took place in Italy, Jersey City, Bayonne in New Jersey, Pula, Rakalj in Croatia, Piran in Slovenia, and places in London like Stansted, Covent Garden, Fitzrovia ...

The surroundings could not be more tranquil. On the slopes overlooking the beautiful Gulf of Piran out in the Adriatic, the Casino Hotel Mulino overlooks the Piran Saltpans Nature Park.