By Train

Thailand's sole international train service links to Butterworth (near Penang) and Kuala Lumpur in Malaysia, continuing all the way to Singapore. Tickets are cheap even in first class sleepers, but it can be a slow ride; the 2-hour flight to Singapore will take you close to 48 hours by rail, as you have to change trains twice. The luxury option is to take the Eastern & Oriental Express, a refurbished super-luxury train that runs along the same route once per week, with gourmet dining, personal butler service and every other colonial perk you can think of. However, at around US$1000 one-way just from Bangkok to Butterworth, this is approximately 30 times more expensive than an ordinary first-class sleeper! While you can't get to Laos or Cambodia by train, you can get very close, with railheads just across the border at Nong Khai (across the river from Vientiane) and Aranyaprathet (for Poipet, on the road to Siem Reap). There are plans to connect to both countries someday, but this is unlikely to happen anytime soon. There are no rail services to Myanmar, but the Thai part of the infamous Burma Death Railway is still operating near Kanchanaburi.