transport: Kentucky

Evidence: 90 • authority: 72

Kentucky (US: , UK: ), officially the Commonwealth of Kentucky, is a landlocked state in the Southeastern region of the United States. It borders Illinois, Indiana, and Ohio to the north, West Virginia to the northeast, Virginia to the east, Tennessee to the south, and Missouri to the west. Its northern border is defined by the Ohio River. Its capital is Frankfort and its most populous city is Louisville. As of 2024, the state's population was approximately 4.6 million. Previously a part of Virginia, Kentucky was admitted into the Union as the fifteenth state on June 1, 1792. It is known as the "Bluegrass State" in reference to Kentucky bluegrass, a species of grass introduced by European s…

Evidence: 54 • authority: 72

Kentucky is situated in the Upland South region of the United States. A significant portion of eastern Kentucky is part of Appalachia. Kentucky borders seven states, from the Midwest and the Southeast. West Virginia lies to the northeast, Virginia to the east, Tennessee to the south, Missouri to the west, Illinois to the northwest, and Indiana and Ohio to the north. Only Missouri and Tennessee, both of which border eight states, touch more. Kentucky's northern border is formed by the Ohio River and its western border by the Mississippi River; however, the official border is based on the courses of the rivers as they existed when Kentucky became a state in 1792. For instance, northbound trav…

Evidence: 48 • authority: 88

Archaeological and Paleoethnobotanical Investigations in Salts Cave, Mammoth Cave National Park, Kentucky. Abstract Reconnaissance, surface collecting, and test excavation were carried on in Salts Cave in August, 1963, by a joint Illinois State Museum-Cave Research Foundation expedition in cooperation with the National Park Service. Various analyses and secondary investigations have continued since then. The main upper passages of the cave were extensively visited during the last millennium B.C. by a prehistoric people who are probably to be assigned to the Early Woodland culture grouping. They were exploiting the mineral resources of the cave, primarily sulfate crystalline deposits, at lea…

Evidence: 48 • authority: 72

Vermont ( ) is a landlocked state in the New England region of the Northeastern United States. It borders Massachusetts to the south, New Hampshire to the east, New York to the west, and the Canadian province of Quebec to the north. According to the most recent U.S. census estimates, the state has an estimated population of 644,663, making it the second-least populated of all U.S. states. It is the nation's sixth-smallest state by total area. The state's capital, Montpelier, is the least populous U.S. state capital. No other U.S. state has a most populous city with fewer residents than Vermont's most populous city, Burlington. Native Americans have inhabited the area for about 12,000 years.…

Evidence: 48 • authority: 80

The Mammoth Cave National Park World Heritage Site

Evidence: 42 • authority: 80

Some engineering geology problems at Mammoth Cave National Park, Kentucky

Evidence: 42 • authority: 80

Present and Future Water Supply for Mammoth Cave National Park, Kentucky

Evidence: — • authority: 72

The Mississippi River is the primary river of the largest drainage basin in the United States. It is the second-longest river in the U.S. after the Missouri. From its traditional source of Lake Itasca in northern Minnesota, it flows generally south for 2,340 mi (3,766 km) to the Mississippi River Delta in the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 32 U.S. states and two Canadian provinces between the Rocky and Appalachian mountains. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana. The main stem is entirely within the United…

Evidence: — • authority: 72

The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Superior, Michigan, Huron, Erie, and Ontario (though hydrologically, Michigan and Huron are a single body of water, joined at the Straits of Mackinac). The Great Lakes Waterway enables modern travel and shipping by water among the lakes. The lakes connect ultimately to the Atlantic Ocean via the Saint Lawrence River as their primary drainage outflow. The lakes are also connected to the Mississippi River basin through the Illinois Waterway. The Great Lakes are the largest group of freshwater lakes on Earth by total a…

Evidence: — • authority: 72

Mammoth Cave National Park is a national park of the United States in south-central Kentucky. It encompasses portions of Mammoth Cave, the longest known cave system in the world. The park's 52,007 acres (21,046 ha) are located primarily in Edmonson County, with small areas extending eastward into Hart and Barren counties. The Green River runs through the park, with a tributary called the Nolin River feeding into the Green just inside the park. The cave system has formally been known as the Mammoth–Flint Ridge Cave System since 1972, when a connection was discovered between Mammoth Cave and the even longer system under Flint Ridge to the north. As of 2025, more than 426 miles (686 km) of pas…

Evidence: — • authority: 72

Jewel Cave National Monument contains Jewel Cave, currently the fifth longest cave in the world and second longest cave in the United States, with 220.33 miles (354.59 km) of mapped passageways as of July 2025. It is located approximately 13 miles (21 km) west of the town of Custer in the Black Hills of South Dakota. Jewel Cave became a national monument in 1908, becoming the first national monument established for the protection and preservation of a cave. In addition to its length, the cave is significant for being one of the best known examples of a breathing cave, in which changes in outside air pressure cause air to flow into and out of the cave. Jewel Cave is named for the calcite cry…

Evidence: — • authority: 72

Wind Cave National Park is a national park of the United States located 10 miles (16 km) north of the town of Hot Springs in western South Dakota. Established on January 3, 1903 by President Theodore Roosevelt, it was the sixth national park in the U.S. and the first cave to be designated a national park anywhere in the world. The cave has calcite formations known as boxwork, as well as frostwork. Approximately 95 percent of the world's discovered boxwork formations are found in Wind Cave. Wind Cave is one of the best known examples of a breathing cave. The cave is recognized as the densest cave system in the world, with the greatest passage volume per cubic mile. Wind Cave is the sixth lon…