Peru
A two-day hike from the village, down into the canyon, walking through several villages and staying overnight at the oasis at the bottom, where you can take a much needed swim.
We just turned up and a local guide - who was excellent - approached us, set us up with beds and food and took us the following day. A great way to acclimatise yourself for the Inca trail walk or any other activities at altitude.
Also pretty cool is the stop off on the way there/ back at the Cruz del Condor to see the Andean condors. As far as I remember the public bus stops there and you can pick another one up later.
Bus from Arequipa which is about 100 miles away.
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