Yes and No 🙂
Reservations by mail or online are recommended for guaranteed spots on all tours (more in adventure tours). Reservations help us determine the number of guides we need to ensure that our groups remain manageable and enjoyable, and they allow us to notify you of changes to the tour due to weather or anything that could disturb the tours.
In any case, we have 2 commercial offices in the center of Salta where you can come and book any activity in which we have availability.