Las Lajas Sanctuary (Spanish: Santuario de Las Lajas) is a basilica church located in the southern Colombian Department of Nariño, municipality of Ipiales and built inside the canyonof the Guáitara River.

The present church was built in Gothic Revival style between 1916 and 1949. The name Lajacomes from the name of a type of flat sedimentary rock similar to shale.