Celestine (the IMA-accepted name) or celestite is a mineral consisting of strontium sulfate (SrSO4). The mineral is named for its occasional delicate blue color. Celestine and the carbonate mineral strontianite are the principal sources of the element strontium, commonly used in fireworks and in various metal alloys.
Strontianite (SrCO3) is an important raw material for the extraction of strontium. It is a rare carbonate mineral and one of only a few strontium minerals. It is a member of the aragonite group.
Kelleys Island is both a village in Erie County, Ohio, and the island which it fully occupies in Lake Erie. The British originally called it Sandusky Island. Later the United States took it over and officially designated it as Island Number 6 and Cunningham Island. It was renamed as Kelleys Island in 1840 by brothers Datus and Irad Kelley, who had purchased nearly the entire island.
Marblehead is a village in Ottawa County, Ohio, United States. The population was 903 at the 2010 census.
Put-in-Bay is a village located on South Bass Island in Put-in-Bay Township, Ottawa County, Ohio, United States, 35 miles (56 km) east of Toledo. The population was 154 at the 2020 census.
Crystal Cavern(s), also known throughout the years as Alabama Caverns and McClu(n)ney Cave, is a small cavern containing crystal formations located in Clay, Alabama, USA.
A geode is a geological secondary formation within sedimentary and volcanic rocks. Geodes are hollow, vaguely spherical rocks, in which masses of mineral matter are secluded. The crystals are formed by the filling of vesicles in volcanic and subvolcanic rocks by minerals deposited from hydrothermal fluids; or by the dissolution of syn-genetic concretions and partial filling by the same or other minerals precipitated from water, groundwater, or hydrothermal fluids.
The Bass Islands are three American islands in the western half of Lake Erie. They are north of Sandusky, Ohio, and south of Pelee Island, Ontario. South Bass Island is the largest of the islands, followed closely by North Bass Island and Middle Bass Island. They are located in Put-in-Bay Township, Ottawa County in the state of Ohio. Historically Middle Bass has also been called Ile de Fleurs and North Bass was known as Isle St. George.
South Bass Island is a small island in western Lake Erie, and a part of Ottawa County, Ohio, United States. It is the southernmost of the three Bass Islands and located 3 miles (4.6 km) from the south shore of Lake Erie. It is the third largest island in the Lake Erie Islands, and is part of Put-in-Bay Township. In the bay of South Bass is Gibraltar Island, home to the Ohio State University's Stone Laboratory.
Ruby Falls is a series of underground cascading waterfalls totaling 145 feet (44 m) in Lookout Mountain, near Chattanooga, Tennessee, in the United States.
A show cave—also called tourist cave, public cave, and, in the United States, commercial cave—is a cave which has been made accessible to the public for guided visits.
Howe Caverns is a cave in Howes Cave, Schoharie County, New York. Howe Caverns is a popular tourist attraction, providing visitors with a sense of caving or spelunking, without needing the advanced equipment and training usually associated with such adventures.
Crystal Cave is a cave near Kutztown in Berks County, Pennsylvania, United States, the heart of Pennsylvania Dutch Country. It was discovered by William Merkel and John Gehret on November 12, 1871, and quickly became a popular tourist attraction.
The Wyandotte Caves is a pair of limestone caves located on the Ohio River in Harrison-Crawford State Forest in Crawford County, 5 miles (8 km) north-east of Leavenworth and 12 miles (19 km) from Corydon in southern Indiana which are a popular tourist attraction. Wyandotte Caves were designated a National Natural Landmark in 1972. They are now part of O'Bannon Woods State Park. The cave system is the 5th largest in the state of Indiana.
The Rainbow River is located in Dunnellon, Florida, United States, in the southwest corner of Marion County, about 20 miles (32 km) southwest of Ocala, 100 miles (160 km) northwest of Orlando and 100 miles (160 km) north of the Tampa Bay area. It is formed by a first-magnitude spring that is ranked fourth in the state for volume of discharge. In addition to the springs located at the headwaters, there are many smaller springs that discharge from numerous caves, rock crevices, and sand boils the entire length of the river.
Raccoon Mountain Caverns is a cave located in Chattanooga, Tennessee in a band of Mississippian Period limestone, part of the Cumberland Plateau.
The Majestic is a historic riverboat that is moored on the Ohio River at Manchester, Ohio. Built in 1923, she was the last floating theater to be built in the United States, and one of its longest-lived. Declared a National Historic Landmark on December 20, 1989.
Natural Tunnel State Park is a Virginia state park, centered on the Natural Tunnel, a massive naturally formed cave that is so large it is used as a railroad tunnel. It is located in the Appalachian Mountains near Duffield in Scott County, Virginia.
İnsuyu Cave is a show cave situated near Burdur in southwestern Turkey. Being over 500 m (1,600 ft) in length, it was discovered in 1952 and opened to public in 1965. A second cave beyond the show cave was later discovered. The lakes inside the both caves are in danger of drying due to excessive drilling of wells in the valley above. However, efforts are underway to reverse the process.
