Much like the wide expanse of land that comprises the metropolis, Houston's diverse ethnic background provides a wealth of exciting cultural opportunities and exploits. This diversity extends to the distinction of being home to NASA as well as world-famous rodeos. Culturally, the Museum District contains such estimable galleries as the Museum of Fine Arts and the Houston Museum of Natural Science while downtown's Theater District hosts the biannual Bayou City Art Festival and other acclaimed performance events. Sports are a mainstay of Houston's community, with five professional teams, including MLB's Houston Astros and the NBA's Houston Rockets, calling the city home.