Rocking Rollers The Friday File: The tallest roller coaster in the world is the Kingda Ka at 456 feet in Jackson, New Jersey. It’s held the record since 5/05. The fastest coaster; the Formula Rossa which peaks at 149 mph in Abu Dhabi. The longest coaster is the Steel Dragon 2000, at 8,133 feet in Nagoya, Japan, and The Smiler near Stoke-on-Trent, England has the most inversions with (OMG don’t eat lunch) 14!