Hernando County is a county located on the west central coast of the U.S. state of Florida. As of the 2020 census, the population was 194,515. Its county seat is Brooksville, and its largest community is Spring Hill.
Spring Hill is a census-designated place (CDP) in Hernando County, Florida, United States. The population was 113,568 at the 2020 census, up from 98,621 at the 2010 census. Spring Hill belongs to Florida's Nature Coast region and is in the Tampa-St. Petersburg-Clearwater metro area. It is east of Hernando Beach, southwest of Brooksville, and north of Tampa.
Weeki Wachee is an unincorporated community and former city located in Hernando County, Florida, United States. As of the 2020 census, the community has a total population of 16. The 12,000-acre (4,900 ha) Weeki Wachee Preserve and the Weeki Wachee Springs park are located in the area. The park includes water rides, animal shows, mermaid costume shows, and manatee watching. The communities of Weeki Wachee Gardens and Spring Hill are nearby.
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. Sink and stream sink are more general terms for sites that drain surface water, possibly by infiltration into sediment or crumbled rock.
Sheck Exley was an American cave diver. He is widely regarded as one of the pioneers of cave diving, and he wrote two major books on the subject: Basic Cave Diving: A Blueprint for Survival and Caverns Measureless to Man. On February 6, 1974, Exley became the first chairman of the Cave Diving Section of the American National Speleological Society. During his career, he established many of the basic safety procedures used in cave and overhead diving today. Exley was also a pioneer of extreme deep scuba diving.
The Woodville Karst Plain is a 450-square-mile (1,200 km2) karst area that runs from Tallahassee, Florida, U.S. to the Gulf of Mexico separated by the Cody Scarp.
The Woodville Karst Plain Project or WKPP, is a project and organization that maps the underwater cave systems underlying the Woodville Karst Plain. This plain is a 450-square-mile (1,200 km2) area that runs from Tallahassee, Florida, U.S. to the Gulf of Mexico and includes numerous first magnitude springs, including Wakulla Springs, and the Leon Sinks Cave System, the longest underwater cave in the United States. The project grew out of a cave diving research and exploration group established in 1985 and incorporated in 1990.
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.
Wakulla Springs is located 14 miles (23 km) south of Tallahassee, Florida and 5 miles (8.0 km) east of Crawfordville in Wakulla County, Florida at the crossroads of State Road 61 and State Road 267. It is protected in the Edward Ball Wakulla Springs State Park.
Weeki Wachee Springs is a natural tourist attraction located in Weeki Wachee, Florida, where underwater performances by "mermaids," women wearing fish tails as well as other fanciful outfits, can be viewed in an aquarium-like setting in the spring of the Weeki Wachee River. A waterpark, Buccaneer Bay, river boat rides, kayak and paddleboard rental are some of the other activities offered at Weeki Wachee Springs.
The Big Bend of Florida, United States, is an informally-named geographic region of North Florida where the Florida Panhandle transitions to the Florida Peninsula south and east of Tallahassee. The region is known for its vast woodlands and marshlands and its low population density relative to much of the state. The area is home to the largest single spring in the United States, the Alapaha Rise, and the longest surveyed underwater cave in the United States, the 32-mile (51 km) Wakulla-Leon Sinks cave system.
The Blauhöhle is the largest cave system in the Swabian Alps in southern Germany. The Blauhöhle presumably originated in a time when the Danube still flowed through the Blau valley. Since the shifting of the Danube, several small rivers, the Schmiech, the Ach, and the Blau, have flowed through this valley. The cave system begins about 21 meters under water at the base of the Blautopf. It continues west and northwest, rising and falling several times until after a horizontal distance of about 1,200 metres (3,900 ft) it comes above the level of ground water and opens into the second big air-filled chamber. The maximum depth of the cave under water is 42 metres (138 ft).
Zacatón is a thermal water-filled sinkhole belonging to the Zacatón system - a group of unusual karst features located in Aldama Municipality near the Sierra de Tamaulipas in the northeastern state of Tamaulipas, Mexico. It is the deepest known water-filled sinkhole in the world with a total depth of 339 meters (1,112 ft). The 392 meters (1,286 ft) deep Pozzo del Merro is deeper, but its nature as a near-vertical cave or a sinkhole still being debated.
The Weeki Wachee River is a river in Hernando County, Florida, United States. It flows 12 miles (19 km) westwards from Weeki Wachee to the Gulf of Mexico at the Weeki Wachee estuary. The name is derived from the Seminole: uekiwv /oykéywa, wi:-/ "spring" and -uce /-oci/ "small", signifying either a small spring or an offshoot of a town named Spring. The river is best known for its spring, and the Weeki Wachee Springs attraction built on the premises. The spring is the surfacing point of an underground river, which is the deepest naturally occurring spring in the United States. It measures about 150 feet (46 m) wide and 250 feet (76 m) long, and daily water averages 150 million gallons. The water temperature is a steady 72–74 °F (22–23 °C) year-round.
Jarrod Michael Jablonski is a pioneering technical diver and record setting cave diver as well as an accomplished business owner and operator. These business operations include Halcyon Manufacturing, Extreme Exposure Adventure Center and Global Underwater Explorers. In July 2021 Jablonski launched and now operates the world's deepest pool at Deep Dive Dubai. Jablonski is one of the main architects behind the 'Doing It Right' system of diving.
Chassahowitzka Wildlife Management Area (WMA) preserves 24,243 acres of sandhill, mesic hammock, and forested wetland habitat ten miles north of Weeki Wachee in Hernando County, Florida. The area consists of one large tract of land, with three satellite tracts nearby.
Edward Ball Wakulla Springs State Park is a Florida State Park in Wakulla County, Florida, United States. This 6,000 acre (24 km2) wildlife sanctuary, located south of Tallahassee, is listed on the National Register of Historic Places, and designated a National Natural Landmark.
Sistema Huautla is a cave system in the Sierra Mazateca mountains of the southern Mexican state of Oaxaca. As of April 2021 it was the deepest cave system in the Western Hemisphere, 1,560 metres (5,120 ft) from top to bottom, with over 55 miles of mapped passageways.
The 1973 Mount Gambier cave diving accident was a scuba diving incident on 28 May 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.
Cave diving is underwater diving in water-filled caves. The equipment used varies depending on the circumstances, and ranges from breath hold to surface supplied, but almost all cave diving is done using scuba equipment, often in specialised configurations with redundancies such as sidemount or backmounted twinset. Recreational cave diving is generally considered to be a type of technical diving due to the lack of a free surface during large parts of the dive, and often involves planned decompression stops. A distinction is made by recreational diver training agencies between cave diving and cavern diving, where cavern diving is deemed to be diving in those parts of a cave where the exit to open water can be seen by natural light. An arbitrary distance limit to the open water surface may also be specified. Despite the risks, water-filled caves attract scuba divers, cavers, and speleologists due to their often unexplored nature, and present divers with a technical diving challenge.
