At the base of Ba Na Mountain, about 30 kilometres west of Da Nang, Suoi Mo is another attraction worth a visit, typically in combination with a trek up the mountain.
There's a well-marked road heading north; you'll be asked to pay 5,000 VND at the gate, and the spring is two kilometres further up the road. You'll have to get out and walk the last couple of hundred metres when you reach the cafes at the entrance to the spring proper. If you plan on a picnic, a restaurant serves various Vietnamese dishes but they tend to open irregular hours outside holidays and the weekends, so it's a good idea to bring along your own food.
The path leads along the river, and you'll find some narrow, slippery dirt paths branching out on the left towards the water, which give access to the larger swimming areas. If you go this route, tread carefully and think ahead in terms of where you plan to climb out of the stream. Further up are the waterfalls, which feed into the river at a point where it passes through a stone canyon.
It's a beautiful spot, with plenty of shade, and while it can get a little crowded, it remains a great spot for a refreshing dip. There are many signs painted on the rocks in Vietnamese warning you where you shouldn't dare to climb. If you're nimble enough, you can make it to the base of the falls for a great photo op.