HOLIDAY VILLAS FRANCE | Pas de Calais holiday rental Villas, Cottages and Houses. Pas-de-Calais is a department found in northern France.  The department is located in the region of Nord-Pas de Calais. Its capital is Arras. Its principal coastal towns are Calais and Boulogne-sur-Mer. Other significant in-land towns include Artois, Lens, Liévin, and Saint-Omer. There are numerous rivers within the department including Authie, Canche, Ternoise, Liane, Sensée, Scarpe, Deûle, Lys and Aa. Pas-de-Calais is one of the most heavily populated departments of France, and yet it has no large cities. The centre and south of the department are more rural, but still quite heavily populated, with many villages and small towns all worth visiting when you rent a holiday house or cottage in Pas-de-Calais, France.