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  2. Xiaozhai Tiankeng - Wikipedia

    en.wikipedia.org/wiki/Xiaozhai_Tiankeng

    The Xiaozhai Tiankeng is 626 meters (2,054 feet) long, 537 meters (1,762 feet) wide, and between 511 and 662 meters (1,677 and 2,172 ft) deep, with vertical walls. Its volume is 119,349,000 m³ and the area of its opening is 274,000 m 2. This material has been dissolved and carried away by the river.

  3. Sinkhole - Wikipedia

    en.wikipedia.org/wiki/Sinkhole

    The Red Lake sinkhole in Croatia. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet.

  4. Kola Superdeep Borehole - Wikipedia

    en.wikipedia.org/wiki/Kola_Superdeep_Borehole

    The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1]

  5. PHOTOS: Sinkholes as deep as eight-story buildings form along ...

    www.aol.com/news/2015-07-28-photos-sinkholes-as...

    The Dead Sea is disappearing at an alarming rate, leaving behind thousands of sinkholes that are chipping away at the coastline's vibrant and touristy atmosphere. The Dead Sea - which is actually ...

  6. Huge 60ft-deep sinkhole opens up in quiet residential cul-de-sac

    www.aol.com/news/huge-60ft-deep-sinkhole-opens...

    Around 30 homes on the estate have been evacuated after the sinkhole opened up in Pant in Merthyr Tydfil on Sunday Huge 60ft-deep sinkhole opens up in quiet residential cul-de-sac Skip to main content

  7. Monster sinkhole opens along major NJ highway, leading to ...

    www.aol.com/monster-sinkhole-opens-along-major...

    The sinkhole — which appeared large enough to swallow several cars hole — opened on the side of Interstate 80 in Wharton sometime around 7:45 a.m. Monster sinkhole opens along major NJ highway ...

  8. Red Lake (Croatia) - Wikipedia

    en.wikipedia.org/wiki/Red_Lake_(Croatia)

    Red Lake (Croatian: Crveno jezero) is a sinkhole containing a karst lake near the city of Imotski, Croatia.It is known for its numerous caves and high cliffs, reaching over 241 metres (791 ft) above normal water level and continuing below the water level.

  9. Zacatón - Wikipedia

    en.wikipedia.org/wiki/Zacatón

    At a total depth of 339 meters (1,112 ft), it is one of the deepest known water-filled sinkholes in the world. [ 1 ] Using an autonomous robot, the underwater portion of Zacatón has been measured to be 319 meters (1,047 ft) deep (a 20-meter (66 ft) difference between the rim of cliff and surface of water adds to the total depth). [ 2 ]