Police in Belgium believe to have uncovered what may be one of the largest synthetic drug production sites in the entire European Union, housed inside of an unassuming old pig barn between the northwest border of Belgium and the Netherlands.

According to the BBC, this monstrous 10,764 sq ft facility was readily equipped with enough custom-made equipment to produce several hundred kilos of ecstasy on a weekly basis. During their raid police with the help of Europol seized over $4.1 million worth of chemicals believe to have been used in ecstasy production, undoubtably making this one of the largest drug busts in history.