Iconic spots, such as Rainbow Mountain, Huacachina, the Peruvian Amazon, and the Inca Trail (and many other hiking trails), are absolutely gorgeous.
If your heart is set on South America for your first solo trip, I recommend Peru. This incredibly diverse country will expose you to a variety of experiences, cultures, and especially climates. Iconic spots, such as Rainbow Mountain, Huacachina, the Peruvian Amazon, and the Inca Trail (and many other hiking trails), are absolutely gorgeous. I mean, they are all bucket-list worthy!