Blue Hole (Castalia)
The Blue Hole captured the public’s interest because of its size, about in diameter, clarity, vibrant blue hue, and enigmatic "bottomless" appearance. Contrary to prevalent belief, the depth of the Blue Hole is not unknown, but has been sounded and found to be about deep. Water temperature is about throughout the year. Floods and droughts have no effect on temperature or water level. The Blue Hole is fed by a passing underground stream which discharges of water daily into Sandusky Bay to the north, feeding into Lake Erie. The water contains lime, soda, magnesia and iron, and because the Blue Hole is anoxic, it cannot naturally sustain fish. The surrounding terrain is developed on limestone bedrock and exhibits karst topography due to dissolution of the limestone by ground water, creating water-filled sinkholes. The Blue Hole was known to American Indians and was first recorded in history in 1761. Several similar blue holes are known to local residents. The Blue Hole that once was a tourist attraction is now off limits to the public. It is located on the grounds of Castalia Trout Club. It is to be distinguished from another hole similar in size and eerie bluish-green color. This latter hole is owned by the Castalia State Fish Hatchery operated by the Ohio Department of Natural Resources, Division of Wildlife and is open for public viewing.
Blue Line (TRAX)
Beyond East 10600 South, the Blue Line heads north-northwest until it reaches Sandy Civic Center (the former southern terminus of the Blue Line, until August 18, 2013). This station is several blocks east of Sandy City Hall and the South Towne Center Mall. The Porter Rockwell Trail runs by the east side of this station and, as the trail heads north, it crosses over to the west of the Blue Line tracks at East 10000 South/East 9800 South and then runs north parallel to the Blue Line until it ends at East 8530 South. From Sandy Civic Center, the Blue Line heads north, crossing East 10000 South/East 9800 South (Sego Lily Drive) and, while running along the west side of South 170 East, passing the east side of both Jordan High School and the South Towne Exposition Center. Just after crossing East 9400 South the Blue Line reaches an infill station, Sandy Expo, which provides service to Rio Tinto Stadium in addition to the South Towne Exposition Center.