The following is a list ofsinkholes,blue holes,dolines,crown holes,cenotes, andpit caves. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. Some are caused bykarst processes—for example, the chemical dissolution ofcarbonate rocks[1] orsuffosion processes.[2] Sinkholes can vary in size from 1 to 600 m (3 to 2,000 ft) both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found worldwide.[3]
2010 Guatemala City sinkhole – a disaster in which an area approximately 20 m (65 ft) across and 90 m (300 ft) deep collapsed, swallowing a three-story factory.
2016 Florence sinkhole – a sinkhole, thought to have been caused by a bursting of a water pipe, opened up a 200 m (660 ft) hole on theArno River bank.[4]
Sistema Sac Actun – an underwater cave system situated along the Caribbean coast of the Yucatán Peninsula with passages to the north and west of Tulum, Quintana Roo
Bayou Corne sinkhole – created from a collapsed underground salt dome cavern operated by Texas Brine Company and owned by Occidental Petroleum, discovered on August 3, 2012, and 350 nearby residents were advised to evacuate
Lake Peigneur – was originally a shallow freshwater body inLouisiana, until a man-made disaster on November 20, 1980 changed its structure, affecting the surrounding land and making it abrackish water lake
Dean's Blue Hole is the world's second deepest known salt waterblue hole with an entrance below the sea level.
Biržai Regional Park – a park in northern Lithuania established in 1992 to preserve a distinctive karst landscape
Blue Hole (Red Sea) – a submarine sinkhole around 94 m (308 feet) deep in east Sinai, a few kilometres north ofDahab, Egypt on the coast of the Red Sea.
2018 Surabaya City sinkhole – a 30 m (98 ft) wide and 15 m (49 ft) deep sinkhole opened up on Gubeng Road inSurabaya, Indonesia during construction work on December 18, 2018.
