>>3254904Adjustment brush in LR, be very careful to paint over just the cold stones, then set the effect to "temp" and increase the temp amount until you get the desired look. The key is picking a right value for the temp, and being accurate in your brushing.
You can see the quick mask I painted in the pic.
Also, the horizon wasn't level. This is absolutely a must in landscape unless you're going for a special look.