Definitely top of woodwork and anything tall eg fridge. Some nasty surprises there, especially when the wood is chipboard and unfinished and you didn’t know. I would include kitchen shelves where containers of foodstuff used often are kept, especially cooking basics. This also applies to the shelves cooking implements are kept. Recently I discovered the shelves in my saucepan cupboard seem to have suddenly developed stains which I think have come from the base of the saucepans which are all quite old and well used. It’s developed over time so went unnoticed but now it is and it looks awful. Awhile ago it was the shelves my little containers of herbs and spices sit on, dust and small spills had multiplied without me noticing because it developed slowly and because, I think, I only ever looked at them mid cooking.
