You m ay also want to look for the (mythical) Mel's Hole.
From Wikipedia:
"The legend of the bottomless hole started on February 21, 1997, when a man identifying himself as Mel Waters appeared as a guest on
Coast to Coast AM with
Art Bell. Waters claimed that he owned rural property nine miles west of
Ellensburg in
Kittitas County,
Washington that contained a mysterious hole. According to Waters, the hole had an unknown depth of at least 80,000 feet. He claimed to have measured its depth using fishing line and a weight, although he still had not hit bottom by the time 80,000 feet of line had been used. He also claimed that his neighbor's dead dog had been seen alive sometime after it was thrown into the hole. According to Waters, the hole's magical properties prompted US federal agents to seize the land and fund his relocation to
Australia.
[2]
Waters made guest appearances on Bell's show in 1997, 2000, and 2002. Rebroadcasts of those appearances have helped create what's been described as a "modern, rural myth". The exact location of the hole was unspecified, yet several people claimed to have seen it,
[1][3] such as Gerald R. Osborne, who used the ceremonial name Red Elk, who described himself as an "intertribal medicine man...half-breed
Native American / white",
[4][5] and who told reporters in 2012 he visited the hole many times since 1961 and claimed the
US government maintained a top secret base there where "
alien activity" occurs.
[6][2] But in 2002, Osborne was unable to find the hole on an expedition of 30 people he was leading.
[7]
Local news reporters who investigated the claims found no public records of anyone named Mel Waters ever residing in, or owning property in Kittitas County. According to
State Department of Natural Resources geologist Jack Powell, the hole does not exist and is geologically impossible. A hole of the depth claimed "would collapse into itself under the tremendous pressure and heat from the surrounding strata," said Powell. Powell said an ordinary old mine shaft on private property was probably the inspiration for the stories, and commented that Mel's Hole had established itself as a legend "based on no evidence at all".
[2]"