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  2. List of lakes by depth - Wikipedia

    en.wikipedia.org/wiki/List_of_lakes_by_depth

    Therefore, mean depth figures are not available for many deep lakes in remote locations. [9] The average lake on Earth has the mean depth 41.8 meters (137.14 feet) [9] The Caspian Sea ranks much further down the list on mean depth, as it has a large continental shelf (significantly larger than the oceanic basin that contains its greatest depths).

  3. Mariana Trench - Wikipedia

    en.wikipedia.org/wiki/Mariana_Trench

    The deepest point of the trench is more than 2 km (1.2 mi) farther from sea level than the peak of Mount Everest. [a] At the bottom of the trench, the water column above exerts a pressure of 1,086 bar (15,750 psi), more than 1,071 times the standard atmospheric pressure at sea level. At this pressure, the density of water is increased by 4.96%.

  4. Woodingdean Water Well - Wikipedia

    en.wikipedia.org/wiki/Woodingdean_Water_Well

    The Woodingdean Water Well is the deepest hand-dug well in the world, at 390 metres (1,280 ft) deep. It was dug to provide water for a workhouse. [1] [2] Work on the well started in 1858, and was finished four years later, on 16 March 1862. It is located just outside the Nuffield Hospital in Woodingdean, in Brighton and Hove, England, United ...

  5. Deep sea mining - Wikipedia

    en.wikipedia.org/wiki/Deep_sea_mining

    Deep sea mining is the extraction of minerals from the seabed of the deep sea. The main ores of commercial interest are polymetallic nodules, which are found at depths of 4–6 km (2.5–3.7 mi) primarily on the abyssal plain.

  6. Hranice Abyss - Wikipedia

    en.wikipedia.org/wiki/Hranice_Abyss

    Hranice Abyss. Hranice Abyss (Czech: Hranická propast) is the deepest flooded pit cave in the world. It is a karst sinkhole near the town of Hranice, Czech Republic.The greatest confirmed depth is 519.5 m (1,704 ft), of which 450 m (1,476 ft) is underwater.

  7. Challenger Deep - Wikipedia

    en.wikipedia.org/wiki/Challenger_Deep

    On 1–3 June 2008, during Leg 1, the Japanese robotic deep-sea probe ABISMO (Automatic Bottom Inspection and Sampling Mobile) on dives 11–13 almost reached the bottom about 150 km (93 mi) east of the Challenger Deep: "Unfortunately, we were unable to dive to the sea floor because the legacy primary cable of the Kaiko system was a little bit ...

  8. Molloy Deep - Wikipedia

    en.wikipedia.org/wiki/Molloy_Deep

    The Molloy Deep (also known as the Molloy Hole) is a bathymetric feature in the Fram Strait, within the Greenland Sea [1] east of Greenland and about 160 km (100 mi) west of Svalbard. It is the location of the deepest point in the Arctic Ocean .

  9. Extremes on Earth - Wikipedia

    en.wikipedia.org/wiki/Extremes_on_Earth

    The easternmost and westernmost points on Earth, based on the east–west standard for describing longitude, can be found anywhere along the 180th meridian, which passes through the Arctic, Pacific, and Southern Oceans, as well as parts of Siberia (including Wrangel Island), Antarctica, and three islands of Fiji (Vanua Levu's eastern peninsula, the middle of Taveuni, and the western part of ...