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The Arun Valley in Nepal is the deepest valley in the world. For reference, you can check the book, The Arun : a natural history of the world's deepest valley by Edward W Cronin in the year 1979. ISBN: 9780395262993 To know more about arun river that make arun valley in sankhuwasava District, Trekking trip also available to explore arun valley Explore the deepest valley in the world "The Arun valley"
Arun Valley in Nepal
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In the Rift Valley some of the Lakes are the deepest in the world, Lake Tanganyika for example at 1470 metres
The African Great Rift Valley is longest, and the Cotahuasi Canyon is deepest.
Death Valley is the deepest point on the North American continent. You don't say which continent you are on.
The Yarlung Tsangpo Grand Canyon in Tibet is considered the deepest canyon in the world. It is about 17,000 to 21,000 feet deep and stretches for about 150 miles.
The highest part of Lehigh Valley is at an elevation of 2180 feet and the lowest point of Lehigh Valley is 211 feet. The deepest part of Lehigh Valley should be about 1970 feet deep.
The deepest valley in the solar system is Valles Marineris and is located on Mars.
Heddon valley, where the Hunter's Inn is situated. Is one of the deepest valleys in England. Any deeper and it would officially be a gorge.
Death Valley in California
The Mariana Trench is the deepest in the world.