Pennsylvania is a state in the northeastern United States. The capital is Harrisburg, the largest city is Philadelphia. Pennsylvania played a crucial role in the founding of the United States: both the Declaration of Independence and the United States Constitution were adopted in Philadelphia. The state is characterized by a mix of urban and rural life. Typical of Pennsylvania are the dense forests, rolling countryside and Amish communities known for their simple lifestyle and traditional arts and crafts. Major landmarks include the Liberty Bell and Independence Hall in Philadelphia, the historic center of the American Revolution. The city of Gettysburg is home to Gettysburg National Military Park, where one of the most famous battles of the American Civil War took place. Pittsburgh, another important city, is known for its steel industry and its numerous bridges. Hershey's Chocolate World is a popular family attraction.