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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. The sinkhole is a doubly nested structure ...
Mythological lands. Plato 's Atlantis described in Timaeus and Critias. Agartha, in the Hollow Earth. Atlantis, Plato's utopian paradise. Avalon, the mythical lost land or island in Arthurian, Cornish and Welsh legend. Buyan, an island with the ability to appear and disappear in Slavic mythology. Cantre'r Gwaelod, in Welsh legend, the ancient ...
The Grotto, Victoria is a sinkhole geological formation and tourist attraction, found on the Great Ocean Road outside Port Campbell in Victoria, Australia. Ewens Ponds – series of three water-filled limestone sinkholes on Eight Mile Creek 25 kilometres (16 mi) south of Mount Gambier and 8.4 km (5 + 1 ⁄ 4 mi) east of Port MacDonnell, South Australia.
December 1974. Devil's Millhopper Geological State Park is a Florida state park located in the north-westernmost part of Gainesville, Florida, off County Road 232, also known as NW 53rd Avenue and Millhopper Road, northwest of the University of Florida . The park is maintained by the Florida Park Service, a division of the Florida Department of ...
The earliest known world maps date to classical antiquity, the oldest examples of the 6th to 5th centuries BCE still based on the flat Earth paradigm. World maps assuming a spherical Earth first appear in the Hellenistic period. The developments of Greek geography during this time, notably by Eratosthenes and Posidonius culminated in the Roman ...
Gulf of the Ganges ( Bay of Bengal) left, Southeast Asian peninsula in the center, South China Sea right, with "Sinae" (China). The Ptolemy world map is a map of the world known to Greco-Roman societies in the 2nd century. It is based on the description contained in Ptolemy 's book Geography, written c. 150. Based on an inscription in several ...
World map. A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensional surface of the Earth. While this is true of any map, these distortions reach extremes in a world map.
Lighthouse Reef as seen from space. The Great Blue Hole is near the center of the photograph. The Great Blue Hole is a giant marine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km (43 mi) from the mainland and Belize City. The hole is circular in shape, 318 m (1,043 ft) across and 124 m (407 ...