A bit pricey for the entrance fee (100k kip for butterfly park vs. 25k kip for the main park and waterfalls), but seems like it goes to a good cause. Much fewer people than the main waterfalls! The staff is really friendly. You can't cycle to the butterfly park, so be sure to lock your bike at the main park entrance parking for motorbikes and bicycles. Bicycle parking price: 5k kip.