The last section of the trail ran above six thousand metres.
Fortunately, they somehow stopped from going over the edge and spent the night above 8,000 metres.
It is also the largest natural lake in the Alps lying above 1,000 metres.
The crest of the ridge is above 300 metres for the central 8 km.
Cloud forests are in only a few areas above 500 metres.
The high Mediterranean mountains above 1700 metres presents some special characteristics.
With a surface area of 9.5 km2, it is the largest lake in Switzerland lying above 1,000 metres.
The "Skywalk" is 1,430m above sea level and 60 metres long.
It was the first skyscraper above 100 metres built in Barcelona.
There are no inhabited areas on the mountain above 600 metres.