We arranged to do a trip in Kanchanaburi which took in the Erewan waterfalls, a cave temple, hellfire pass and the death railway bridge and bridge over the river kwai.
It was a good trip, but it rained all day - it seems whenever we book something it starts to rain, so we've decided not to do any more trips!!! we stayed in Kanchanaburi for 3 nights, the hostel was really nice, and it was relaxing. We booked a bus to Phuket from the hostel, only to get to Bangkok, to find they'd dropped us off in the middle of nowhere, so we didnt' know where to get the bus from! We ended up having to stay another night in Bangkok, and then got a bus the next day to Krabi because we decided we didn't want to go to Phuket after all!