I made this short video at a place that's been nicknamed "The Sticky Falls", and it's not hard to see how it got that name. When you arrive and see people walking over the steep rocks in the water, it looks really dangerous. But because the traction is so good, it's actually pretty safe.
The reason for this is the high mineral content in the water. As it flows over the rocks and tree roots, it gradually coats them in limestone. It's the same process that creates stalactites in caves, but instead of a slow drip of water, it's a fast flow.
The waterfall is actually called Nam Tok Bua Tong (น้ําตกบัวตอง), but if you want to take a taxi there they'll know what you mean if you say Sticky Falls. It's easy to go in a car or on a motorbike as well. It's about an hour's drive north of Chiang Mai and quite easy to get to. It's marked on Google Maps and there are signs at the turnoff. I've had the place entirely to myself both times I've been, once by going late in the afternoon and waiting for everyone to leave, and once by arriving around 9 am before others get there.
The song in the video is by the Petch Phin Thong Band and is from a traditional style of Thai music that in the 1960s and 1970s became infused with jazz and latin rhythms to create what I think is a really cool sound. https://www.soundwayrecords.com/Shop/PhysicalDetails?pid=SWR_PH_18