There's something kind of fascinating about holes.
Standing on the edge of a great canyon, cavern or sink hole makes a person feel small. It's also a common phobia for many people.
Perhaps one of the strangest types of holes are sinkholes. Here's a little more information on this strange phenomenon:
They've swallowed Corvettes in Kentucky, condos in Florida and homes in Texas. Clearly, sinkholes are not to be sneezed at. But what causes these collapses of supposedly solid ground?
Sinkholes are pits in the ground that form in areas where water gathers without external drainage, according to the U.S. Geological Survey. As water drains below ground, it can dissolve subterranean caverns, particularly in areas where the bedrock is made of water-soluble evaporate rocks such as salt or gypsum or of carbonate rocks such as limestone or dolomite…
Areas with underlying dissolvable rock are most susceptible to sinkholes. According to the USGS, the most dangerous spots are in Florida, Texas, Tennessee, Pennsylvania, Alabama, Missouri and Kentucky.
There are often warning signs before a sinkhole collapse, however. The ground may slump noticeably, causing fence poles or trees to lean. Subsiding soil might also expose buried surfaces of trees or foundations, according to the Suwannee River Water Management District in Florida.
A structure threatened by a sinkhole may show small cracks, and doors and windows may stick or refuse to shut as the structure subtly settles. Circular patches of wilting vegetation or water gathering in small ponds where it never gathered before can also hint that the ground is failing.
Watch the video below to learn more about sinkholes and the other fascinating holes that can be found around the world.
15 of the World's Strangest Holes
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