A developer is seeking federal approval for air space for a 650-foot-tall roller coaster on the Las Vegas Strip.
The Las Vegas Review-Journal reports that U.S. Thrill Rides LLC submitted plans to the Federal Aviation Administration in April for the ride it calls the Polercoaster.
The application shows the tower at the Tropicana Las Vegas hotel-casino on the south end of the Strip.
That means the FAA has to assess hazards to air traffic at nearby McCarran International Airport.
The structure would be about half as high as the 1,149-foot Stratosphere tower - topped by an observation deck, dining and retail.
Company President Michael Kitchen tells the Review-Journal it could cost $100 million, but financing isn't complete.
He says it would be the tallest roller coaster in the world.