Cusco sits near 3,400 meters; racing to “conquer the city” on day one usually fails. A short plaza walk, an afternoon nap, and steady fluids are most travelers’ best prescription. Leave heavy meals and alcohol for day two.
Coca tea or leaves help some people—they are not miracles; seek medical help for serious symptoms. Pause on stair streets; do not sprint for selfies. Keep museum and church visits near flatter ground at first.
From day three, valley outings feel better. Cusco opens its stones gently to the patient.