Summary for English-speaking visitors to Grenstreinbus.be | Grensoverschrijdende treinen en bussen vanuit België
Reizen met de bus: Brussel ↔ Maastricht | FlixBus
Combined train + STIB, TEC or De Lijn season ticket | SNCB
Everything about InterCity trains | SNCB International
België / Luxemburg - Trein & Fiets mee | Treinreiswinkel
Eurekarail - Drielandentrein, dé verbinding tussen mensen, steden en culturen
Tips reizen met de trein in België. | Wereldreizigersclub
Treinen in Nederland | Interrail.eu
Belgian Railways Network, Official map. (Belgium) | Map, Train map, Belgium train
NMBS has no plans for its own Three Countries Train | RailTech.com
Belgium and the Netherlands in a single diagram: that is what could be the future light rail line that would connect Hasselt, B, with Maastricht, NL. Don't know when or whether this