While we were up in Langkawi, we decided to visit the Seven Wells Waterfall (Telaga Tujuh). It gets its name from the seven natural pools that the waterfall flows through. We arrived in the afternoon and started our walk up to the waterfall. We didn't know what to expect in terms of a crowd and were pleasantly surprised to find it pretty quiet, probably because it was the first weekend of Ramadan. There are two sections to the falls: the first you reach will lead you to the pools at the bottom of the cascade, the second is a further climb up to a few more pools and a spectacular view from the top. It is 600+ (well-paved) steps to the top so you will definitely work up a sweat (especially if you have a baby or a toddler attached to you like we did) - it took us around 15 minutes each way at a pretty steady pace, with one or two short breaks and with Oscar walking some of the way.
When we got to the very top, Steve and Oscar got into one of the pools while I sat on the rocks with River. The water was cool but refreshingly pleasant after the hike up. We met a few other travelers, one who had hurt his arm after slipping down one of the small cascades - the rocks can be very slippery so definitely exercise caution. You can also go down some of the natural "slides" (like Steve did)! Like most other waterfalls, the amount of water is very much weather dependent. In hot months with little rain, the waterfall can be pretty dry and doesn't look quite as impressive as it does in rainier season.
Later, we walked down to the bottom section of the waterfall. The vertical cascade was pretty magnificent and the kids and I sat down on a rock and just enjoyed the view while I nursed River. Steve went exploring up the rocks and even had a couple of local men show him where the water was deep enough for jumps and a spot to get an intense waterfall massage (haha!). Oscar eventually decided he wanted to go in too, so he went in for another swim before we set out back to the hotel for some dinner. We definitely enjoyed our time there and would recommend it as an activity on a visit to Langkawi.
If you do end up visiting Seven Wells, the Langkawi Sky Cab and Sky Bridge are actually a walkable distance away. The view is pretty spectacular from all the way up in the mountains. It is, however, very touristy and accessible, so expect everyone else (and their kids and their grandparents) to be up there with you. The cable car ride is one of the steepest in the world and I'll admit that I was extremely nervous on it (I had to hand River off to Steve because I couldn't deal with her moving around so much) - Oscar and Steve really enjoyed it though! We went late in the day and didn't really have to queue (in fact, we almost missed the sky bridge because of early Ramadan hours) but I definitely read that it can get very busy (so be prepared!). We wouldn't necessarily do it again if we were there, but it was definitely worth seeing once!