Vestnesa Gas Hydrate Ridge (video) CAGE - Center for Arctic Gas Hydrate, Climate and Environment Share Print E-Mail Loading video... Caption Eight hundred-meter-high gas flares rise from the seabed at Vestnesa Ridge today. That's the size of the tallest manmade structure in the world -- Burj Khalifa in Dubai. Credit Alexey Portnov/CAGE Usage Restrictions Only to be used to illustrate this and related news items. Attribution, no derivatives, no commercial use Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.