Bangkok’s main train station, Hualamphong Station, is centrally located.
Trains departing daily to many destinations in Thailand.
For overnight journeys, tickets should be bought at least a day in advance.
There is a luggage storrage office at the train station.
It is also possible to travel overland from Bangkok into Malaysia, there is a train each day to Butterworth (in Penang) which takes 21 hours.
From there its possible to continue to Kuala Lumpur and Singapore with an onward connection.
Image credit: https://pixabay.com/de/bangkok-stadt-trainer-pendler-leer-1953661/