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</html><thumbnail_url>https://incredibleperutours.com/wp-content/uploads/Mal-de-altura.webp</thumbnail_url><thumbnail_width>815</thumbnail_width><thumbnail_height>450</thumbnail_height><description>The Inca Trail to Machu Picchu crosses elevations above 4,200 meters above sea level, where the oxygen available is approximately 40 percent lower than at sea level. This reduction in oxygen can cause altitude sickness, known in Peru as soroche, a condition that can affect travelers regardless of age, gender, or physical fitness. Understanding how [&hellip;]</description></oembed>
