Swimming with the fishes takes on a whole new meaning at these parks. SeaWorld Entertainment is one of the US's largest theme park operators. The company markets its parks as family-friendly, offering learning opportunities (SeaWorld and Discovery Cove, where visitors can swim with dolphins and other marine life), all-ages entertainment (the Sesame Street-themed park Sesame Place), and traditional amusement parks (Busch Gardens). Previously a subsidiary of brewer Anheuser-Busch, the company was sold to  Blackstone for about $2.3 billion in late 2009 and became a public company in 2013.