Five Miles High
Well, not really.
When we were in Peru during the first week of January we travelled by minibus up into the Colca Canyon to see the Condors. Unfortunately the condors had not been prepared for our visit and so most of them were having a lie-in. However the trip was no less exciting and interesting. As we climbed we we consumed Coca tea, sometimes with another herb added, to stave off the symptoms of altitude sickness. Whether it worked or just kept the local trade in Coca leaves thriving I am not sure. Before descending to Chivay for an overnight stay. (More about that some day) we achieved an altitude of 5000m which is high in any scale of measurement.
This was brought home to me on our return flight to the UK via the dreadful services of Delta Airlines. Our first landfall of England was over the Isle of Wight and through the clear day the land looked just like a satellite picture. On the aircraft TV screen I learned that our altitude at that time was 5000m.
It's much more fun getting that high in a minibus with Coca tea!