Kingda Ka in the United States of America is the world’s tallest roller coaster ride. It is made in steel. Kingda Ka is located at Six Flags Great Adventure in Jackson, New Jersey, and opened in 2005. It is at a height of 456 feet (139 m) and accelerating up to 128 miles per hour (206 km/h) in 3.5 seconds.. Kingda Ka is named after a 500-pound mythical tiger. It also plays music. The ride has 4 trains with 5 cars. At the top, passengers are weightless for a second.