I always hoped that someone would find the place(s) in the Teuterboro forrest where the Roman legions were decimated. Should be a lot of broken weapons and such, even though the German victors would have tried to pick the battlefield clean.
The Romans located and cleaned up the site, then tried to hunt down Arminius; kicked his ass (it was close for a while), he ran off out of reach, and about eight years later was killed by one of his relatives (close family I guess). The Romans reoccupied what they’d lost, and added to it. It’s a common misconception that the Romans never recovered from it. What they didn’t recover from in the long run was the depletion of the Gallic population in the aftermath of Julius Caesar’s victory in the Gallic Wars. There had been a continual push westward down the steppe (a push that earlier on had got the Celts into western Europe in the first place) and that continued, getting worse as the climate cooled off.