A tourist on a boat journey has captured some rare and incredible footage of an iceberg tipping over, bringing a huge mass of ice above the surface of the water.
The tipping of iceberg is not unusual, but it is rarely captured in a video. Icebergs tip when they become unbalanced after melting.
The tourist, who captured the incredible video, was travelling near the Upsala Glacier in Argentina.
The 1 min 19 sec video was uploaded on YouTube on March 27, 2012 under the name "osibaruch" and has been viewed more than 120, 000 times.
"While we were passing by it with a catamaran, the huge berg lost a part of itself (look at the right side sinking) and then flipped over with a huge roar. In the process of melting this happens all the time, but it is seldom that it is captured on video WHEN it happens," the tourist said on YouTube.
After 15 seconds, the iceberg can be seen tipping into the water. As the iceberg sinks, ice below rises from the water, creating waves.
According to BBC, the Upsala Glacie stretches for 60 kilometers and was once the biggest in South America.
Watch the video here:
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