My first time over 4000 meters above sea level. I did feel the elevation, especially since we gained most of it by car (there's a dirt road leading up to 4000 meters).
The X Seed 4000, the 4000 meter tall building (Remade) - video Dailymotion
At an average altitude of 4,000 meters (2.5 miles) above sea level,... | Download Scientific Diagram
Climbing the Alps 4000 meter peaks
Scenery from 4000 meters high | I was still climbing slowly … | Flickr