The Caspian Sea is also classed as the world's largest lake.
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Every year, Alaska has about 5,000 earthquakes.
31
The water between India and Sri Lanka is only 3-30 feet deep and was purportedly passable on foot until 1480 AD when a cyclone moved some sand around.
1
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
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There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109