Teatro Colón is the main opera house in Buenos Aires, Argentina. Acustically, it is considered one of the five best theaters in the world. The current Colón replaced the original theater, inaugurated in 1857. The current theater was inaugurated on March 25, 1908 with the opera Aida by Giuseppe Verdi, after 20 years of works. After its period of gigantic success, the decline of the theater became remarkable and plans were made of massive renovation. After the beginning of the changes and reforms in 2005, the theater was closed in October 2006 until May 24, 2010, when the 2010 season was opened. The Colón Theater was visited by the greatest singers and opera companies in the world. It is one of the main tourist attractions of Buenos Aires, being possible to take a guided tour of the theater. The theater is limited between 9 de Julho Avenue, Liberdade Street, Rua Arturo Toscanini and Rua Tucumán. It is the heart of the city, where there is also Parque Plaza station. The auditorium is horseshoe-shaped, with 2487 seats (more than the Royal Opera House in Covent Garden, London), a thousand standing places and a stage 20 meters wide, 15 meters high and 20 meters deep.