<Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (June 2013) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (June 2013) (Learn how and when to remove this template message) </Td> </Tr> <P> Some of the largest sinkholes in the world are: </P> <Ul> <Li> Blue Hole--Dahab, Egypt . A round sinkhole or blue hole, 130 m (430 ft) deep . It includes an archway leading out to the Red Sea at 60 m (200 ft), which has been the site for many freediving and scuba attempts, the latter often fatal . </Li> <Li> Boesmansgat--South African freshwater sinkhole, approximately 290 m (950 ft) deep . </Li> <Li> Lake Kashiba--Zambia . About 3.5 hectares (8.6 acres) in area and about 100 m (330 ft) deep . </Li> </Ul>

Where does the dirt go in a sinkhole