The park is divided into four main areas--Italy, Germany, France, and the U.K./Great Britain because it comprises of three other 'countries' England, Ireland and Scotland. The UK/GB area is what welcomes you when you first step foot into Busch Gardens.
Among the favorite rides, you shouldn't miss Escape from Pompeii and Apollo's Chariot located in Italy and the Alpengeist and Griffon in France. Don't forget to take the Aeronaut SkyRide that transfers you in one-way rides from the UK/GB to France, France to Germany, and Germany to UK/GB. These sky trams are highly recommended. As to why I say so, check out a previous post. Also, don't ever leave Busch Gardens without dropping by Oktoberfest. It's grand, unlike any food court I have ever been. Plus the food is great.
Europe is still in one of my future travel lists. But with all that's happening there, a piece of it while in the US, despite in a make-believe theme park, ain't that bad.