Are cheap combined tickets for the park and the train available?
Thanks to SNCB's Discovery Ticket, you enjoy 50% discount on the train journey in 2 class there and back to and from Landen. Follow the steps below to make use of this advantage:
Buy an e-ticket for Plopsaqua Hannut-Landen online via the webshop
Then surf to the SNCB website and, when booking your train journey, enter the code printed on your ticket for the park to redeem your discount.