The entire book of Devarim is one long event – Moshe’s parting words with the nation. It begins with Moshe listing the locations they travelled through, which Rashi notes are thinly veiled hints to the sins and tragedies that took place at each of them.
But if Moshe goal was to rebuke, the way to do that ought to have been through subtle references to the events. The locations were incidental to the events that took place – so why list the places at all?
Perhaps it is because the places themselves are central to understanding how they went wrong.
Teshuva – as delineated by the Rambam – is only fully achieved when the same person, in the same situation, in the same place, do not make the same mistake. The specification of the place is important – sin harms the atmosphere it occurs in, which is then rectified through repentance.
Moshe referenced the locations because they had been damaged by the impact of their behaviour. The Jews were on the cusp of entering Israel – he pleaded with them not to make the same mistakes that they had in the desert. The desert events had been bad, but not catastrophic. Israel would not be like anything they had experienced though, and their actions would have an effect on the environment. We testify this every day in the third paragraph of Shema.
The land of Israel is sensitive to the actions of its residents – Moshe hinted to them to take care of it.