Miami is a major urban city center, and a leader in finance, commerce, culture, media, entertainment, the arts, and international trade.
In addition to the central business district, the area also consists of the Brickell Financial District, Historic District, Government Center, Omni and Park West. The neighborhood is divided by the Miami River and is bordered by Midtown (Edgewater and Wynwood) to the north, Biscayne Bay to the east, Civic Center and Overtown to the west, and Coconut Grove to the south.
In 2012 Miami was classified as an Alpha−World City in the World Cities Study Group's inventory. In 2010, Miami ranked seventh in the United States in terms of finance, commerce, culture, entertainment, fashion, education, and other sectors. It ranked 33rd among global cities. In 2008, Forbes magazine ranked Miami "America's Cleanest City", for its year-round good air quality, vast green spaces, clean drinking water, clean streets, and citywide recycling programs. According to a 2009 UBS study of 73 world cities, Miami was ranked as the richest city in the United States, and the world's fifth-richest city in terms of purchasing power. Miami is nicknamed the "Capital of Latin America"  and is the largest city with a Cuban-American plurality
Locally known as Downtown, Miami has grown and physically expanded to become the fastest-growing area in Miami-Dade, with rapid increase in population and the greatest concentration of high-rises in the region. Greater Downtown is home to many major museums, parks, education centers, banks, company headquarters, courthouses, government offices, theaters, shops and many of the oldest buildings in the city.
For most of Miami's history, its economy has been based on tourism which continues to be the principal industry in Miami, the city's economy has become more diversified. Trade is increasingly vital to the economy. Its close proximity to Latin America and the Caribbean make it the center of international trade with those areas. Because many companies choose to establish their Latin American headquarters in southern Florida, Miami-Dade County is known as the "Gateway to the Americas."