Mol is easy to reach by taking a hit either of the freeway from Antwerpen to Liege, or the one that goes North bound towards Eindhoven (also from Antwerpen). It lays in the South-Eastern part of the Kempen and the province of Antwerpen. By car it's not that difficult to find.
The Belgian and Dutch "Kempen" are very great terrains for biking. There are several tours through the forests, along heatherfields, the abbeys, towns and villages and natural centres.