Caracas has its share of good theaters; most are open Wednesday through Sunday though some only offer performances on weekends. The Ateneo theater is known to have interesting performances and houses Rajatabla, one of the country's well-known theater groups. Every April, Caracas hosts an International Theater Festival, which is an excellent choice for visitors wishing to see some of Latin America's best theater. The Complejo Cultural Teresa Carreño hosts many concerts and ballets and attracts foreign performers as well as locals. The Aula Magna in the Universidad Central de Venezuela is a recommended performing arts hall with excellent acoustics. This is where the Symphony Orchestra of Caracas performs (usually on Sundays) and where many cultural activities are also performed. For filmgoers, Caracas also has more than 50 cinema theaters, but productions tend to be the imports from the United States.