This park is located 62k north of Da Nang near Lang Co beach. Not very accessable and very hard to find. It only has a small sign to announce it's entrance off the main road. The cost to enter the park is 5000k vnd for Vietnamese and 10k for foreigners, I thought that had changes but no way. A small fee for the moto is also charged. the water was cool, and very clear and clean. Small huts with mats are available for rent at 20k too. The lady attendents will offer to cook you a meal of BBQ chicken. It was great! Free range birds done on the grill over coals....mmmm! With vegetables and rice total cost with tip $20 USD with drinks. The rocks are quite slippery so caution is the word upon the approach to the water. My only complaint about this and other sites I've visited is that the locals don't seem to care about keeping the place clean. All manner of debri is discarded and left. Even in the water. What ever happened to "take nothing but pictures and leave nothing but footprints"? The water , depending on the amount of rain is very fast moving but there are ample ropes and huge rocks to cling to for novice swimmers. With Viet Nam having so much water there are very few accomplished swimmers. Life jackets are available for use but if they're not fitted propely they're more of a nuisance than a help.