Kuang Si Falls
A large multi-tiered waterfall, accessible by boat or truck hire. You can also rent a motorbike to transport yourself there. There are food and tourist stalls outside the waterfalls. It is worth putting a whole day aside (or more) for seeing these because they are a great place to relax and meet other travellers. There are multiple pools at different levels, all of which are reportedly safe to bathe in, and are extremely picturesque. Shared tuk-tuks charge about 30,000-50,000 kip (cheapest seems to be near slow boat pier, though you can get them for 40,000 kip near Joma Bakery). You may have to wait until the tuk-tuk fills up. Tuk-tuks are legally only allowed to take six people, and there is a checkpoint at the falls, so some drivers may try to get a 7th person in the front seat. Private tuk-tuk will cost you at least 150,000 kip, but you will need to bargain for some time; don't hesitate to start from 100,000 kip if the driver tells you 150,000 kip. Drivers may try to show you documents that quote 200,000 kip or more depending on driver. Just ignore this and insist. Try to go with 5 people and insist on 30,000 kip each. The driver should wait for 3-4 hours at the waterfall gate area. Make sure your 150,000 kip includes there and back. Bargain, bargain, bargain. Just remember that there are dozens of tuk-tuks around, so you have the advantage. If you lack companions, offer 30,000 kip and wait until he finds more passengers. A seat in a minibus costs 40,000 kip, more if booked through a travel agent.