I might be guilty of adding lakes. But only if they had iron age watery offerings in them. or crannogs. honest.
I'd argue that some natural features are totally in the spirit of the original TMA book and JC's (literally modern antiquarianish as opposed to unfringily academically archaeological) theorising about mother hills and sacred landscapes and so on. In fact there's a whole chapter about 'proto neolithic temples'.
(I'm like a dog with a bone. Although I'm not about to shout 'Splitter!' yet.)