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Deepest trenches
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Largest islands
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Longest rivers
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Highest waterfalls
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Largest lakes
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Tallest mountains
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Largest deserts
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1
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Challenger Deep/Mariana Trench (11033 m)
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Greenland (2,130,800 km2)
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Nile – Kagera (6650 km)
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Angel Falls (979 m)
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Caspian Sea (371,000 km2)
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Everest/ Sagarmatha/ Chomolungma (8,848 m)
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Sahara (9,400,000 km2)
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2
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Tonga Trench (10882 m)
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New Guinea (785,753 km2)
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Amazon – Ucayali – Apurímac (6400 km)
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Tugela Falls (948 m)
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Superior (82,414 km2)
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K2/Qogir/Godwin Austen (8611 m)
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Arabian Desert (2,330,000 km2)
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3
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Galathea Depth (10540 m)
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Borneo (748,168 km2)
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Yangtze (6300 km)
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Three Sisters Falls (914 m)
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Victoria (69,485 km2)
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Kangchenjunga (8586 m)
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Gobi Desert (1,300,000 km2)
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4
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Kuril-Kamchatka Trench (10500 m)
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Madagascar (587,713 km2)
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Mississippi–Missouri–Jefferson (6275 km)
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Olo'upena Falls (900 m)
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Huron (59,600 km2)
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Lhotse (8516 m)
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Kalahari Desert (900,000 km2)
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5
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Kermadec Trench (10047 m)
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Baffin Island (507,451 km2)
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Yenisei–Angara–Selenge (5539 km)
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Yumbilla Falls (896 m)
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Michigan (58,000 km2)
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Makalu (8485 m)
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Patagonian Desert (670,000 km2)
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6
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Izu-Ogasawara Trench (9780 m)
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Sumatra (473,481 km2)
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Yellow River (5464 km)
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Vinnufossen (860 m)
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Tanganyika (32,893 km2)
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Cho Oyu (8188 m)
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Great Victoria Desert (647,000 km2)
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7
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Japan Trench (9000 m)
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Honshu (225,800 km2)
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Ob–Irtysh (5410 km)
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Balåifossen (850 m)
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Baikal (31,500 km2)
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Dhaulagiri I (8167 m)
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Syrian Desert (520,000 km2)
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8
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Puerto Rico Trench (8605 m)
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Victoria Island (217,291 km2)
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Paraná – Río de la Plata (4880 km)
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Pu'uka'oku Falls (840 m)
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Great Bear Lake (31,080 km2)
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Manaslu (8163 m)
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Great Basin Desert (492,000 km2)
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9
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Yap Trench (8527 m)
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Great Britain (209,331 km2)
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Congo–Chambeshi (4700 km)
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James Bruce Falls (840 m)
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Malawi (30,044 km2)
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Nanga Parbat (8126 m)
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Chihuahuan Desert (450,000 km2)
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10
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South Sandwich Trench (8428 m)
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Ellesmere Island (196,236 km2)
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Amur–Argun (4444 km)
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Browne Falls (836 m)
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Great Slave Lake (28,930 km2)
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Annapurna I (8091 m)
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Great Sandy Desert (400,000 km2)
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Also, please consider "papua new guinea" for new guinea.
I got all the rivers and lakes. Would have gotten all the islands if "Britain" were accepted for Great Britain. Looks like more than half of people missed that one, probably for the same reason. "Britain" should be accepted.
After the Mariana Trench, I just started guessing names of places that are near oceanic plate boundaries and I lucked out with the Japan Trench.
A gripe though: By what definition is Antarctica not a desert? If you're not counting cold deserts, then the Gobi shouldn't count either.