Washington DC, formally known as the District of Columbia, is the capital city of the United States of America. It is a federal district, meaning it is not part of any state, and is located on the northern shore of the Potomac River. The city is characterized by its significant political influence and is home to many national monuments and museums, primarily situated on the National Mall. As the seat of the U.S. federal government and several international organizations, it is a hub for American politics and history. The architecture ranges from neoclassical to modern styles, and the city is divided into quadrants centered around the Capitol Building. Washington DC is also known for its diverse neighborhoods, each with its own distinct culture and vibe. The city's green spaces, such as Rock Creek Park, provide residents and visitors with an urban escape. The economy is heavily influenced by the government sector, but also includes industries such as education, finance, and tourism. Despite its political prominence, Washington DC offers a vibrant cultural scene with a variety of dining, entertainment, and shopping options.