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  2. Middle Fork American River - Wikipedia

    en.wikipedia.org/wiki/Middle_Fork_American_River

    The Middle Fork near Hawver Cave and the old Mountain Quarries Railroad. In 1906 John C. Hawver, an Auburn dentist, discovered large limestone caverns along the lower Middle Fork canyon north of Cool at a height of some 700 feet (210 m) above the river. Some 400 specimens were removed from the site, including fossils of saber-toothed tigers ...

  3. Mark Twain Cave - Wikipedia

    en.wikipedia.org/wiki/Mark_Twain_Cave

    Mark Twain Cave — originally McDowell's Cave — is a show cave located near Hannibal, Missouri. It was named for author Mark Twain whose real name was Samuel Langhorne Clemens . Clemens lived in Hannibal from 1839 to 1853, age 4 to 17.

  4. Patricia Crowther (caver) - Wikipedia

    en.wikipedia.org/wiki/Patricia_Crowther_(caver)

    The Tight Spot proved to be the critical juncture leading to the passages connecting Mammoth Cave and the Flint Ridge Cave System. [2] Both Patricia Crowther and her then-husband Will Crowther, also a computer programmer, participated in many expeditions that attempted to connect the caves. She was part of the September 9, 1972 expedition that ...

  5. 18 of Earth's most otherworldly and unique caves - AOL

    www.aol.com/lifestyle/2017-07-12-18-of-earths...

    Located in central Slovakia, the Ochtinska cave is a UNESCO World Heritage Site filled with peculiar tufts and spikes of aragonite like a natural Chihuly sculpture.

  6. List of deepest caves - Wikipedia

    en.wikipedia.org/wiki/List_of_deepest_caves

    This list of deepest caves includes the deepest known natural caves according to maximum surveyed depth as of 2024. The depth value is measured from the highest to ...

  7. Caving - Wikipedia

    en.wikipedia.org/wiki/Caving

    Caving in a muddy section of Black Chasm Cave in California Stephens Gap, a vertical cave in Alabama. Caving, also known as spelunking (United States and Canada) and potholing (United Kingdom and Ireland), is the recreational pastime of exploring wild cave systems (as distinguished from show caves).

  8. Grand Canyon Caverns - Wikipedia

    en.wikipedia.org/wiki/Grand_Canyon_Caverns

    Located on the Coconino Plateau, a few miles west of the Aubrey Cliffs that rise to over 6,100 feet (1,900 m) above sea level, the Caverns lie within an alluvial plain at an elevation of about 5,300 feet (1,600 m). Limestone comprises the majority of the subsurface area of this vicinity of the Coconino Plateau, an area riddled with numerous ...

  9. Zane Shawnee Caverns - Wikipedia

    en.wikipedia.org/wiki/Zane_Shawnee_Caverns

    The Zane Shawnee Caverns is a cave system in Jefferson Township, Logan County, Ohio, United States. The caverns are show caves owned by the nonprofit United Remnant Band of the Shawnee Nation as of 1995. [1] These caverns are located between Zanesfield and Bellefontaine, Ohio, near the Ohio Caverns.