Never dig a hole for others, because there are enough sinkholes on earth. Take stock of the well-known earth sinkholes.

The following content is for reference and learning only, and the ranking is not divided.

order	name	position	introduce
1	Great Blue Hole	Belize	Located 40 miles off the coast of Belize, great blue hole is part of the UNESCO World Heritage site. The so-called blue hole is actually an underwater cave with a very special structure. After achieving a perfect coexistence with the surrounding reefs, it will form a natural scene that looks like a blue ring from a high place. The big blue hole in Belize is still one of the places with the least number of explorations on earth. Although Fabian Cousteau has drawn a 3D map of the hole, it is still attracting explorers from all over the world. It seems that there are still some mysterious places waiting for people to discover, don’t you think?
2	Dashiwei Tiankeng group scenic spot, china	Leye County of Baise City and Fengshan County of Hechi City	Dashiwei is located in the north of Shuba village, Tongle Town, Leye County. The underground primeval forest area of Dashiwei is the first in the world, with a depth of about 613 meters, ranking second in the world in terms of similar large rock volume funnels, with a length of about 600 meters and a width of about 420 meters. Its volume of 80million cubic meters is also the second in the world, and it is known as the “karst Holy Land” in the world.
3	Xiaozhai Tiankeng	Fengjie County, Chongqing, China	Xiaozhai Tiankeng is located in Fengjie County, Chongqing, China. Xiaozhai Tiankeng is the largest “Tiankeng” in the world. It is near 30 ° 44’23 “north latitude and 109 ° 29 ‘east longitude. Tanking is geographically called a “karst funnel landform”, and Chongqing Xiaozhai Tiankeng is the representative of this geological wonder.
4	Mexican Swallow Cave	Central Mexico	The Swallow Cave in Mexico is home to thousands of bats and swallows, hence the name “Swallow Cave”. One of the ten fascinating caves on earth. How big is the swallow hole? It can devour the entire empire state building, the Empire State Building in New York (381 meters), with a hole depth of 1400 feet (about 426 meters), which is one of the deepest and largest caves in the world.
5	Sima Humboldt sinkhole	Venezuela, Bolivar	The Sima Humboldt sinkhole is 1030 feet (314 meters) deep, 1155 feet (352 meters) wide at the upper edge, and 1647 feet (502 meters) at the bottom. It is composed of quartzite, which seems to be formed by the collapse of the rock after a long period of chemical corrosion. Due to the cliffs on both sides of Sima Humboldt sinkhole, the forests and animals at the bottom of the sinkhole are isolated from the high places for many years, forming a unique ecosystem.
6	Zacatón sinkhole	The State of Tamaulipas, Mexico	It is the deepest known water hole in the world, with a depth of about 1112 feet (339 meters). It is formed because the volcanic rocks at the bottom acidify the water, which in turn gradually corrodes the upper rocks. The most unique place of zakat ó n sinkhole is that there are many small islands floating on the water. Scientists have also found species that they have not paid attention to here. Friends who like hiking might as well have a chance to visit it.
7	Sima de las Cotorras sinkhole	Chiapas, Mexico	It is famous for its wide variety of green parakeets. The parrots seek refuge on the lush branches at the bottom of the cave. It is 520 feet (160 meters) wide and 460 feet (140 meters) deep. Like many other similar sinkholes, Sima de Las cotorras are likely to be formed due to the long-term erosion of limestone by groundwater. The unique ecology here is also very characteristic: birds and small animals, including hummingbirds, Orioles, woodpeckers, hyenas Anteaters, and iguanas also live in the isolated forest at the bottom of the cave. Another unique feature of this cave is that there are 46 rock paintings 230 feet (70 meters) below the upper edge. Experts believe that these rock paintings were carved by the ancestors of the local Sok people 10000 years ago.
8	Minyé sinkhole	Papua New Guinea, New England Island	Miny é sinkhole is located on the New England island of Papua New Guinea. The width of miny é sinkhole is 1148 feet (350 meters), which means that four Boeing 747 can drive side by side across the deep hole, and even can accommodate the fifth plane. It is more than enough to accommodate one and a half Eiffel Tower. It is said that miny é sinkhole is formed by the scouring of underground rivers and rainstorms, and the limestone is eroded, resulting in the collapse of surface rock strata.
9	Priest’s Blue Hole	The Long Island of the Bahar Islands	The priest’s blue hole is located in the waters of Turtle Back Bay on Long Island in the Bahar islands. It is the deepest salt water sinkhole known in the world. The blue hole is about 663 feet (about 202 meters) deep. The diameter of its entrance is 115 feet (35 meters), but this width will continue to increase as it continues to deepen. This sinkhole is a paradise for free divers. Blue holes are common in the Bahamas, and they are also the theme of local legends.
10	Houping Tiankeng group, Wulong	Houping Township, Wulong, Chongqing, china	The yanwanggou karst Canyon in the scenic area is 2300m long and about 500m deep. It is a blind valley type modern canyon. The valley is deep and the forest is quiet, especially in the lower section. The bottom of the valley is deep, and the lower parts of both banks are nearly upright. It is extremely narrow and imposing. Walking in it and feeling different has a certain ornamental value, and it is also of great significance to understand the development and evolution history of hydrology and landform in this area.
11	Guatemala sinkhole	Guatemala	Guatemala sinkhole is a giant sinkhole with a diameter of 20 meters and a depth of about 90 meters that appeared in the urban area of Guatemala, the capital of Guatemala, on May 30, 2010. The accident killed 15 people. According to the National Geographic website of the United States, it may be formed due to the impact of heavy rain caused by tropical storm Agatha. In strict geological academic terms, sinkhole refers to a huge deep pit formed by the collapse of the earth’s surface due to the continuous erosion of solid bedrock by water. Many places in Guatemala have a high probability of sinkholes. Guatemala’s giant pit further expands the term Tiankeng, that is, the sudden collapse of the ground. In general, Guatemala has a high probability of recurrence of such events, but it is very difficult to predict.
12	Winterpark sinkhole	City of Winterpark	According to guuze, Winter Park sinkhole was formed under a public swimming pool in the city in 1981. “As for whether this swimming pool leaks, I have never seen a complete report.” He said that the water may penetrate into the soil below through a small crack at the bottom of the swimming pool. Due to the sandy soil in Florida, even the aquatic plants around the swimming pool may slowly wash away enough soil and erode the solid limestone layer below. Guuzer pointed out that the U.S. Geological Survey mapped bedrock types across the United States. Scientists still need to conduct extensive research on underground cracks and the way water flows through them in order to predict the location of sinkholes.
13	Marbury sinkhole	Florida	The 185-foot (56 meters) deep doomsday sinkhole appeared in Marbury, Florida, in 1994. The collapse occurred in a pile of waste dumped by mining company IMC agric. The company was mining rocks to extract phosphate. Phosphate is a chemical substance, which is the main component of chemical fertilizer. It is mainly used to make phosphoric acid and enhance the taste of soda and various foods. However, after phosphate is extracted from the rock, the waste mainly composed of gypsum is filtered out as mud.
14	Pitcher’s pit	Oklahoma and Kansas border	Years of zinc and lead mining have covered the ground in Piccher, near the Oklahoma-Kansas border, including trapped pits The hole in the photo was taken in 2008. Some mines were too close to the ground during the excavation for the top to support the soil above Weight, eventually leading to a collapse. Gouze of Missouri said: ” Coal mines in Missouri and western Pennsylvania also nearby Now there’s a pit. Our mining technology is getting higher and the top is enough to support the weight of the soil above.
15	Icelandic sinkhole	Iceland	The Icelandic sinkhole is located in the upper reaches of the chokursa River, Iceland’s second longest river, and is formed by rising steam from the geothermal vent below.
16	Mexico Ike Kiel natural well	Mexico	Sigoik Kiel natural well belongs to the sinkhole, which refers to the extraordinary spatial and morphological characteristics of huge volume, steep and trapped rock wall, deep well shaped or barrel-shaped outline, etc. it is developed in the soluble rock stratum with extremely huge thickness and extremely deep groundwater level, from underground to ground, with an average width and depth of more than 100 meters, A super large karst negative terrain whose bottom is connected with the underground river (or there is evidence that the underground river has migrated). This natural well is located near the ancient Mayan ruins of Chichen Itza in Mexico’s Yucatan Peninsula. The sinkholes at sea level will be filled with water, with a depth equivalent to the groundwater level, forming a famous clear blue pool. The Mayan royal family will relax and hold sacrificial ceremonies in the pool.
18	“Unsinkable pit” in Alabama	Alabama	The “unsinkable pit” in Alabama is a limestone pit with a depth of about 50 feet (about 15 meters), in which rare ferns live. In the 1990s, a group of cavers bought the pit to protect this natural wonder for future generations.