Miami is a major coastal city in southeastern Florida, in the United States. Miami is the county seat of Miami Dade County, the most populous county in Florida. With an estimated population of 424,662 in 2007, Miami is the largest city within the Miami metropolitan area, which is the seventh-largest city in the United States with a population of 4,919,036. The United Nations estimated that in 2007, Miami had become the fourth largest urbanized area in the United States, behind New York City, Los Angeles and Chicago.

Miami is recognized as a global city because of its importance in finance, commerce, media, entertainment, arts and international trade. The city is home to many company headquarters, banks, and television studios. It is an international center for popular entertainment in television, music, fashion, film, and the performing arts. The city's Port of Miami is known for accommodating the largest volume of cruise ships in the world and is home to many cruise line headquarters. Miami is also home to the largest concentration of international banks in the United States.

Since 2001, Miami has been undergoing a large building boom with more than 50 skyscrapers rising over 400 fee (122m) built or currently under construction in the city. Miami's Skyline is ranked third most impressive in the US., behind New York and Chicago, and 18th in the world according to the Almanac of Architecture and Design. Its growth has made it the ninth tallest skyline in the United States and the 25th tallest in the world. The city currently has the eight tallest ( as well as thirteen of the fourteen tallest) skyscrapers in the state of Florida, with the tallest being the 789-foot (240m) The Four Seasons Hotel and Tower.

In 2008, Miami was raked as " America's Cleanest City" according to Forbes Magazine for its year-round good air quality, vast green spaces, clean drinking water, clean streets and city-wide recycling programs. In a 2009 UBS study of 73 world cities, Miami was ranked as the richest city in the United States (of four U.S. cities included in the survey) and the world's fifth-richest city, in terms of purchasing power.

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