A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are locally also known as vrtače and shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet. A cenote is a type of sinkhole that exposes groundwater underneath. A sink or stream sink are more general terms for sites that drain surface water, possibly by infiltration into sediment or crumbled rock.
The National Corvette Museum showcases the Chevrolet Corvette, an American sports car that has been in production since 1953. It is located in Bowling Green, Kentucky, off Interstate 65's Exit 28. It was constructed in 1994, and opened to the public in September of that year.
A black hole is an object with sufficient density that the force of gravity prevents anything from escaping from it except through quantum tunneling behavior.
Trout Pond — formerly called Old Pond — located near Wardensville in Hardy County, West Virginia, USA, is the state's only natural lake. The small "lake" is situated in the Trout Pond Recreation Area (TPRA) of the George Washington National Forest. Formerly, the pond had fluctuated in surface area between 2 and 3 acres, but recently it has appeared to be disappearing due to underground structural changes.
A sink is a bowl-shaped fixture used for washing hands or small objects.
Lake Jackson is a shallow, prairie lake on the north side of Leon County, Florida, United States, near Tallahassee, with two major depressions or sinkholes known as Porter Sink and Lime Sink.
Wes Skiles Peacock Springs State Park is a 733-acre (297 ha) Florida State Park located on Peacock Springs Road, two miles (3 km) east of Luraville and on State Road 51, 16 miles (26 km) southwest of Live Oak, Florida. Activities include picnicking, swimming and diving, and wildlife viewing. Among the wildlife of the park are deer, bobcats, raccoon, squirrels, beaver and otters, as well as turkey, blue heron and barred owls. The park name commemorates the work of diver and explorer Wes Skiles. Prior to 2010 the park was known as Peacock Springs State Park. Amenities include a nature trail, six sinkholes, and Peacock and Bonnet Springs, with miles of underwater caves popular with cave divers. The two springs are tributaries of the Suwannee River. The park is open from 8:00 am till sundown year round.
The Leon Sinks Geological Area is located on the Woodville Karst Plain in southern and southwestern Leon County, Florida, United States. It is a mature karstic area on the Upper Floridan Aquifer. It is one of the most extensive underwater cave systems in the world and connects to Wakulla Springs.
Harrison Spring is the largest spring in the U.S. state of Indiana. It is located in west-central Harrison County, near the Blue River and just north of White Cloud.
Lake Miccosukee is a large swampy prairie lake in northern Jefferson County, Florida, located east of the settlement of Miccosukee. A small portion of the lake, its northwest corner, is located in Leon County. The small town of Miccosukee, Florida is located on the north eastern shore of the lake in Leon County.
A ponor is a natural opening where surface water enters into underground passages; they may be found in karst landscapes where the geology and the geomorphology is typically dominated by porous limestone rock. Ponors can drain stream or lake water continuously or can at times work as springs, similar to estavelles. Morphologically, ponors come in forms of large pits and caves, large fissures and caverns, networks of smaller cracks, and sedimentary, alluvial drains.
Peter Sinks is a natural sinkhole in northern Utah that is one of the coldest places in the contiguous United States.
Sinks Grove is an unincorporated community in Monroe County, West Virginia, United States. Sinks Grove is located on West Virginia Route 3, north of Union. Sinks Grove has a post office with ZIP code 24976.
The Caves of the Tullybrack and Belmore hills are a collection of caves in southwest County Fermanagh, Northern Ireland. The region is also described as the West Fermanagh Scarplands by environmental agencies and shares many similar karst features with the nearby Marble Arch Caves Global Geopark.
The Battle of the Sink Hole was fought on May 24, 1815, after the official end of the War of 1812, between Missouri Rangers and Sauk Indians led by Black Hawk. According to Robert McDouall, the British commander in the area, the Sauk had not received official word from the British that the Treaty of Ghent had ended the war with the U.S.
A DNS sinkhole, also known as a sinkhole server, Internet sinkhole, or Blackhole DNS is a DNS server that has been configured to hand out non-routable addresses for a certain set of domain names. Computers that use the sinkhole fail to access the real site. The higher up the DNS resolution chain the sinkhole is, the more requests will fail, because of the greater number of lower NS servers that in turn serve a greater number of clients. Some of the larger botnets have been made unusable by TLD sinkholes that span the entire Internet. DNS Sinkholes are effective at detecting and blocking bots and other malicious traffic.
Pi-hole is a Linux network-level advertisement and Internet tracker blocking application which acts as a DNS sinkhole and optionally a DHCP server, intended for use on a private network. It is designed for low-power embedded devices with network capability, such as the Raspberry Pi, but can be installed on any Linux machine.
In between November 2013 to 2017, more than 200 sinkholes were formed in the Armala area of Pokhara. The sinkholes were formed mostly in the paddy fields in the alluvial fan deposit. The sinkholes terrorised and displaced hundreds of local residents.
The 1973 Mount Gambier cave diving accident was a scuba diving incident in 1973 at a flooded sinkhole known as "The Shaft" near Mount Gambier in South Australia. The incident claimed the lives of four recreational scuba divers: siblings Stephen and Christine M. Millott, Gordon G. Roberts, and John H. Bockerman. The four divers explored beyond their own planned limits, without the use of a guideline, and subsequently became lost, eventually exhausting their breathing air and drowning. As of May 2015, they are the only known fatalities at the site. Four other divers from the same group survived.
