![\"Hiking](\"https:\/\/leo-reuter.de\/siebeninseln\/wp-content\/uploads\/2019\/04\/Caldera_Wanderweg_Wanderer_19_teide.jpg\")
<\/a><\/figure>\n\n\n\nCaldera literally means cauldron. And indeed, this large cauldron was created by the collapse or explosion of a volcanic cone.<\/p>\n\n\n\n Geologists assume that long before the Teide there was a huge primeval volcano at this place. This is said to have been over 5000 metres high and to have collapsed 170000 years ago. Due to its explosion the caldera and with it new volcanoes were formed. And you wander through the middle of this huge semicircle with a diameter of 17 kilometres.<\/p>\n\n\n\n On this small circular walk in the Caldera there is a lot to discover. First you can see the gem obsidian at close range. Obsidian is a shiny rock glass without crystal structure. It is formed by rapid cooling at the surface of the lava. The stone got its name from the Roman Obsius, who is said to have brought the very first obsidian from Ethiopia to Rome in ancient times.<\/p>\n\n\n\n Even if obsidian can appear in many colors, you will only see the black colored obsidian on this way. Worldwide you can find the obsidian at about 70 places. And one of these places is the Caldera at the Teide.<\/p>\n\n\n\n But not only gemstones are interesting to look at. This circular walk offers even more. The hiking trail S 16 is called Sanatorio. And indeed, until 2021, you passed a small cluster of houses on this path. In this small complex, which was very well hidden behind lava rocks, a sanatorium was to be built in the 1960s. Because the mild climate of the Canary Islands is ideal for the treatment of respiratory diseases.<\/p>\n\n\n\n And so, in the last century, patients also came to the caldera in search of the healing climate. They built the small houses themselves. About 100 people were supposed to live there. Later, the decision was made to build a sanatorium. Accommodation was built for the doctors and the staff. Then construction stopped, so the sanatorium was never used. But the buildings stood there until they were demolished in 2021.<\/p>\n\n\n\n And after gemstones and old walls we finally pass striking rocks. This is where the spectacular outdoor shots for the film „Battle of the Titans“ were shot in 2009. Since the impressive landscape in the Caldera offers opportunities for fantastic scenes, numerous videos, commercials and other films have already been shot there.<\/p>\n\n\n <\/p>\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\nDark gem obsidian at the roadside<\/h2>\n\n\n\n
<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\nCaldera – the place for a sanatorium for respiratory diseases<\/h2>\n\n\n\n
<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\nCaldera – Hollywood in Teide National Park<\/h2>\n\n\n\n