Travelling at speeds of 300 km/hr. the Thalys high-speed train connects 17 cities across Western Europe, including Brussels, Amsterdam and Paris. Thalys trains are well known for their efficient travel times and their excellent service. If you wish to travel in luxury and save as much time as you can for sightseeing, then the Thalys is your best choice.
Please keep in mind that reservation fees for the Thalys are quite high. If you have time on your side, you can save some money by taking a regional Intercity train.