First trip to Bangkok is coming up soon. We're staying at the GH Erawan (Diamond upgrade to Grand Suite confirmed with 2010 upgrade). Now I am putting together a plan for our sightseeing/excursion and would welcome any suggestions (from several other useful threads I have seen there many experienced BKK travelers here). I am thinking of doing a day trip by train to the Bridge on the River Kwai. Seems to be much cheaper than the assorted tours offered online. Any reason not to do that? I think I can read up on the history myself, i.e., don't necessarily need a guide, and the ride seems to be a simple roundtrip doable in a day. Thanks for any suggestions you may have to offer (and yes, I have a big fat Lonely Planet book that I'll review, too).