Domestic? Why? It's my understanding that everytime the race comes to SouthAmerica they do in on summer. Corect me if i'm wrong but this may be the first time for a winter visit, and if that is the case, I see 2 possibilities:
1 From Santiago they would go to the ski resorts in the andes (just a couple of hours away), as we are in snow season. I can't think of any other place in Chile that couldn't be visited during summer.
2 Then, somehow, going to MacchuPicchu or the andean Bolivia. The weather in summer in those places makes them hard to visit, while winter is pleasent.