In Question 5 of the Test I have just completed, we had to translate: "She came near to where I was sitting" by inserting the correct word in the gap here: "Ella se acercó ________ yo estaba sentada". It did look to me as if movement was involved, so I chose "... adónde …" [plus the others which carried the accent] … But I was wrong !
Admittedly, when I clicked on "Explain this", I noticed this example:
Iremos adonde tú quieras, cariño >> We will go where (to whichever restaurant) you want, darling...
... which also involves movement, but despite that it uses 'donde' - with no accent !
[This topic has been answered above -
Thank You Inma ! ]