Question

What is the longest valley in the world

Answer 1

Atlantic Ocean ≈10,000 km (6,000 mi)

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Answer 2

Answer: World Rift/Valley Length

Venus Baltis Vallis 6,800 km (4,200 mi)

Earth Atlantic Ocean ≈10,000 km (6,000 mi)

Great Rift Valley 6,000 km (3,700 mi)

Canadian Arctic Rift System 4,800 km (3,000 mi)