IMG Worlds of Adventure, an amusement park that cost more than $1 billion dollars and took three years to build, opened its doors to the public last Wednesday. The park is as big as 28 football fields, measuring some 1.5 million square feet in size, and features a mishmash of characters from Cartoon Network, like the much loved Powerpuff Girls and Disney’s Marvel universe, like the Hulk and Spider-Man, according to reports.