The Elephant Springs, some 53km from Hue, is an excellent natural spring that is well worth a visit. Particularly on a hot day, the natural pool below a small waterfall makes for a very refreshing dip. You can sluice yourself down the smooth rocks at the base of the falls, and there are plenty more spots upstream to explore. The place can be pretty deserted on weekdays and during off season, which is great if you're looking for some privacy, but not so great in terms of getting some food and drinks -- the food stalls around the springs are only open on peak days. When they are, you can enjoy a cold beer and munch on a whole roasted chicken while you're wallowing in the water. When the stalls aren't open, it makes sense to pack a lunch and BYOB. It's not too hard to get to, but it's not well-marked, and it might make sense to hook up with a guide -- most of the motorcycle taxi drivers know where it is. They can also help you sort out the food and drink situation.