Bingling Si is not easy to get to - a couple of hours drive, plus a short boat trip, but worth the effort. The major attraction is the huge Buddha carved into the side of the valley (somewhat over-enthusiastically restored): the other grottoes are relatively small. However the location, among soaring rock pillars, is spectacular. It's also worth making a short trip to the small temple at the head of the valley, tended by the 8th incarnation of the original temple founder!
刘家峡就是坐个船,石窟就算了,坑人啊,门票五十,进去后,走路十分钟就能转一圈出来了,就一个大点的佛像,出来就一个感觉,不值
This was my long day trip from lanzhou which included a bus ride and then taking a speedboat to get to the site. The name of this location is Bingling thousand buddha caves and I don't know about whether there are actually ten thousand buddhas, but there are a number of impressive carvings made into the cliffside. You are going to be limited by the speedboat driver as to the amount of time you get to spend at the site.
Maybe not as impressive as other grottoes in China, however these grottoes are hidden in a very nice scenery making this trip well worth. Made the trip at the end of October 2013. I took the bus from Lanzhou towards Liujiaxia from West Bus Station. The ride took nearly two hours cause the bus driver kept looking for more people to get on the bus. I told the driver i would like to go to Bing Ling Grottoes and he dropped me a few hundred meters before the docks at a small travel office. Eventually i got my trip to the grottoes booked there (beware: No English spoken there, if you don't speak any chinese, this might be a bit of a problem there). I joined three chinese guys and we first drove more than 30 minutes in a private car along the reservoir to a small dock where we changed to a small speedboat. We were then driven to a first site, that we skipped (not sure what it was but it looked not too interesting), and continued to the grottoes (maybe 30 minutes boatride in total), very scenic boatride. We got nearly 2 hours for sight seeing there (and contrary to the previous report here we could take pictures, no problem at all). It's not big, but we joined another group with a guide which gave insightful information as there's not much explanation written about the grottoes. Finally we went back to the same dock by boat where our driver was waiting. He drove us back and also gave us a city tour of Liujiaxia and the water dam. Boat + car ride was 150 RMB for each of us.
The grottoes are small and so are the well-preserved, more than a thousand years old carvings they are holding, except for a gigant and much newer statue of Buddha, right in the middle. There are more than 500 carvings of various Buddhist characters, some of them with much of the original color, in about 200 niches - which I think it's a better description than grottoes. What is absolutely spectacular is the location of all these, almost at the entrance of a narrow canyon, with the Yellow River on the right and amazing towering rocks in the background. Very few visitors around and no restrictions to taking photos. A little more than two hours drive from Lanzhou, mostly through an area with many architecturally interesting and nice looking mosques, followed by an half an hour boat ride.Once you get out of the boat there are a few stalls where you could grab something to eat or drink. A very pleasant day trip from Lanzhou.