It is located 6 kilometres (3.7 mi) to the west of the center of the town of Saint-Nazaire, of which it is a district.

Tati spent weeks searching for a suitable location, and upon discovering Saint-Marc wrote that it was "the little corner I have been dreaming of".

[2] The Hôtel de la Plage, which appeared as the holiday residence of the titular Monsieur Hulot, still exists, and was renovated in 2010.

[2] It originally included Hulot's signature pipe, which was removed by vandals not long after its unveiling.

It has numerous southeast-facing beaches, including: The pointe de Chémoulin, the boundary between the Loire estuary and the Atlantic Ocean, is the site of the Fort de Chemoulin, occupied by the French Navy, who manage Chemoulin's semaphore watchtower and control maritime traffic into the entrance of the estuary.