Pakse itself is not weighed down with things to see. The best sights are the river, the sunset, and the superbly kitsch Champasak Palace Hotel. The Champasak Historical Heritage Museum (Rd. 13; open Mon-Fri 8:30-11:30am and 1:30-4pm; admission 5,000 kip) has a few interesting historical artifacts from ancient temples, interesting textiles, musical instruments, and a fair amount of dreary Communist propaganda. There are also quite a number of wats in the city, none of which are particularly distinguished.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.