CRAZY plans for the longest skyscraper have been ... This vision would make the audacious building 1,000ft longer than the Burj Khalifa in Dubai, the current tallest tower in the world.

it would easily trump the Burj Khalifa -- a skyscraper in Dubai that holds the title of tallest (and longest) building in the world, at 2,722 ft. Original image has been replaced. Credit ...