Site Lange Max is a private domain, 3 km (1.9 mi) from the center of Koekelare, Belgium.

The site is located on an old farmyard and contains the remains of the former biggest gun in the world (1917), the Lange Max.

The site also includes Lange Max Museum, the artillery platform of the Batterie Pommern, a mess, and the Cafeteria De Lange Max.

The farmyard, mess, and artillery platform are protected heritage buildings.

On June 24, 2017, a new war memorial was revealed near the artillery platform of Lange Max.