The Longmen Grottes in Luoyang are one of the less famous but really awesome spots. You can see here thousands of Buddha sculptures made of or into the rocks, from pretty small to incredible tall.
One of the famous rooms, a room completely made of Buddhas
Here you can see the comparison – Buddha against tourist – impressive size of rock made sculptures…
Here a nice view with a fish eye perspective
Luoyang is also a pretty cool place to have dinner or some plates at midnight.