The city of steel of and bridges, Pittsburgh, has been coined America's Most Livable City for good reason. As an American backbone to the industrial revolution, Pittsburgh has grown into one of the largest tourist destinations in the US and now boasts more than 3,000 hotels to house the many travelers looking to see the world's first green buildings and movie theatre. As with any large city, Pittsburgh has had a rising STD problem over the last few decades and the city is aiming to stop the trend by encouraging more residents to get regular STD screening.