Altitude sickness is a concern for many travelers visiting Peru, particularly when you consider that Cusco, Puno and Lake Titicaca are all above 8,200 feet/2,500 meters in elevation (the height at which altitude sickness often occurs). While our bodies are capable of adjusting to high elevations, it takes time. If you ascend too fast, you may experience symptoms that include headaches, dizziness, nausea, fatigue, loss of appetite, sleeplessness, and shortness of breath. Altitude sickness can affect anyone, no matter their age or fitness level, although those with heart and lung conditions, diabetes, asthma, chronic obstructive pulmonary disease, epilepsy, or sickle cell disease may be more susceptible.  To avoid getting altitude sickness, it’s recommended that you don’t ascend more than 1,000 feet/300 meters a day. You should also avoid drinking alcohol when staying at high altitude destinations and stay hydrated by drinking plenty of water. Coca is a natural remedy for altitude sickness in Peru, with its leaves transformed into a delicious tea. Alternatively, you can find oxishots (small portable plastic cans filled with concentrated oxygen) in both Cusco and Aguas Calientes, the gateway to Machu Picchu.