The Les Cailloux business park is an 11-hectare retail park on the edge of the A16/E40 motorway (to Paris/Belgium/Eastern Europe) in Calais. It offers direct motorway access and is situated just a few minutes from the town centre.

Décathlon and BUT opened stores here in 2011.

GAM, in partnership with REDIM (design-execution and property development subsidiaries of the GSE group respectively), is developing a 10,000m² retail park at Les Cailloux to complement the existing commercial outlets.