john jenson got a look inside. >> reporter: it already has the biggest building and the biggest shopping mall. now dubai wants to have the biggest thrills. this is the city's newest amuseme amusement park, img worlds of adventure. it is a 1.5 million square foot theme park with 28 football fields filled with the world largest. >> i wanted this to be an icon for dubai itself and icon for the region. >> reporter: the privately owned park cost over $1 billion and took three years to build. >> this is the raptor. >> reporter: and we got a sneak peek before it opened which meant no lines and no waits. >> it is so big. it can't fit under one roof. it shoots riders from zero to 60 mile-per-hours in 2.5 seconds and the park features car acteres by marvel and cartoon network but it isn't the only destination in town. government owned dubai parks and resort is set to open later this year. it is a massive $3.5 billion development. analysts say theme parks are part of a plan by the rulers to diversify the city economy through tourism. >> it has a lot to offer. it has malls and sun and sand but beyon