Asian Trails. It's easy to travel in the areas around Bangkok on your own, but this company organizes trips to the floating markets, as well as trekking trips, homestays, and bicycle tours. Bangkok, 02/626–2000; www.asiantrails.travel. From B2,600.
Diethelm Travel. Ayutthaya, Kanchanaburi, and the Damnoen Saduak floating market are among the stops on this outfit's four-day, three-night Central Highlights Journey, led by an English-speaking guide. The all-inclusive fee covers lodging, meals, and entrance and boat fees. One-day excursions to the floating market and other attractions are also available. 02/660–7000; www.diethelmtravel.com/Thailand. B19,200 for Highlights tour; call for shorter trips' pricing.