1. ” The hellgate “, Darvaza, Turkmenistan
This crater was created by the men, and it is known under the name of “hellgate”. For more than half a century, the place is encircled by a fire which was lighted in 1971. When the well was dug, a fault formed and a big quantity of gas was liberated. To protect the inhabitants, they set fire to it, by assuming that he would go out at the end of some days. But calculations turned out to be inexact, and fire does not cease raging since. Sometimes, he attains a 10-metre height.
The diameter of the fault is 60 metres and its depth is 20 metres.
2. Well of Holy Patrice, Orvieto, Italy
In spite of its terrible aspect, this well was constructed with good intentions: give some water in the city in case of seat. And he was also put under the protection of a church. The building began in 1527, when the merciful VII pope visited Orvieto after the catch of Rome. If necessary, the water was transported by a donkey up to the fortress of Albornoz.
3. Crater of the volcano Yasur, Vanuatu
Yasur is an active volcano located on the island of Vanuatu, and its last eruption occurred in 2017. Tribes living in this region consider that one lives by an ancient divinity in the crater, which can get angry if it is disturbed. That is why only the ancient and the shamans have the right to climb the volcano.
And the tourists, of course! Audacious come here to climb Yasur, because it is one of the rare volcanoes in the world the crater of which it is possible to attain. Besides , in 2012, the film Chinese Zodiac was turned there.
4. Big hole of Kimberley, Southern Africa
This huge hole is a huge diamond mine today exhausted and located in the city of Kimberley. It is difficult to imagine, but the researchers of precious stones succeeded in digging this hole without using machines.
Their hard labour was fruitful, because it is here that they succeeded in extracting the diamond known as De Beers, who weighed 428,5 karats. This one gave the name to the famous mark of jewellery.
5. Big blue hole, coral reef of Belize
A big chasm, the diameter of which is 305 metres, and the 120-metre depth, was formed by nature. This place attracts the amateurs of diving as a magnet, but many people die there. The crater also has a not official name, the “graveyard of the divers”, because such depth admits no that to the very experienced swimmers, and the beginners do not calculate danger always well.
6. Tower reversed by Sintra, Portugal
In the Portuguese city of Sintra, there is a mysterious well the building of which began at the beginning of last century. The staircase in spiral which encircles it represents the passage of the world in sky or in Hell, according to the place where they want to go. The freemasons practiced theirinitiatory rituals there. The depth of the well is so impressive as he could receive a ten-storeyed building.
7. Wall of a dam, North of the California
The biggest artificial hole of the world is in the United States, more precisely in the north of the California.
The dam is impressive: tons of water pass in some seconds. This structure was constructed, more than 50 years ago, but since then, it makes the object of the enthusiasm of the tourists of the whole world.
8. Er Wang Dong, China
A group of speleologists discovered incidentally in China a large network of caves in which developed a local ecosystem. There, it is possible to dive into the fog and to notice the clouds which are formed under the domes of caverns.
Rivers and underground lakes which are are populated there with creatures which are found nowhere else on the planet. They notably find that the fish there albino without eyes, who lived in complete darkness, so he needs to differentiate light nor colours.
9. Eisriesenwelt, Austria
This cave is located in more than 1 500 metres in altitude. Its name is translated of German by “the World of the giants de Glace”. It is the biggest cavern frozen in the world: she is 42 kilometres long and 407 metres deep, and the volume of its glacial skull caps is superior to 30 000 cubic metres.
If in the past the tourists needed to climb 1 641 metres to go to the cave, today, they can make it in some minutes, because a cable was installed to achieve it.
10. Big hole, Guatemala
This unearthing was created by nature in our epoch. On the June 1st, 2010 , in broad daylight, in Guatemala, the earth collapsed under a plant of three-storeyed clothes as well as lived accommodation. On its place, a huge crater appeared.
Researches point out that that is due to the soil rich in limestone, which is easily taken by the water. But places point rather at the dilapidation of the sewerage of the city.