Apach is a commune in the Moselle department in Grand Est in northeastern France.Apach is 2km from Sierck-les-Bains, 25km from Thionville, and 50km from Metz. It is on the border of Germany and Luxembourg, the municipalities just across the border being Perl in Germany and Schengen in Luxembourg.A natural reserve for orchids is located along the limestone hillsides, of which there are a lot in this town.