Because of its huge size, its concentrated wealth, and its mixture of people from around the world, New York City offers its residents and visitors a staggering array of cultural riches and educational opportunities. The city is the world's leading center for performing arts and its museums contain a wide range of artistic and historical subjects. A mixture of cultures from around the world is reflected in the street festivals and ethnic celebrations that take place year-round. In addition, more than 100 institutions of higher education operate in New York City, including some of the nation's more prestigious centers of learning.