Check out the absolute King of all coasters. This ride is known as Kingda Ka and currently holds the record for the world’s tallest roller coaster. It reaches a whopping height of 456 ft! If that wasn’t impressive enough, it speeds from 0-128 mph in a jaw-dropping 3.5 seconds! That makes it the country’s fastest, too. All you can do is hang on as you zoom up the completely vertical climb to the top. This has got to be the most exciting minute of your life you will ever experience! (Well, 50.6 seconds to be exact!) Kingda Ka opened in May 2005 at Six Flags Great Adventure in Jackson, New Jersey, USA. It’s certainly not one for the faint-hearted! Would you be brave enough to ride this?