+1 for Symphony Hall in Boston. A benchmark of acoustics.
Other favorites are Smetana Hall at the Obecní dům in Prague: delicate, open sound. Teatro Massimo in Palermo: precise, weighty, immediate. Troy Savings Bank Music Hall in Troy NY: perhaps the best rendering of a piano quintet I've ever heard.
Most fun while watching an opera: Teatro Regio in Parma. A critical audience to be sure.
Other favorites are Smetana Hall at the Obecní dům in Prague: delicate, open sound. Teatro Massimo in Palermo: precise, weighty, immediate. Troy Savings Bank Music Hall in Troy NY: perhaps the best rendering of a piano quintet I've ever heard.
Most fun while watching an opera: Teatro Regio in Parma. A critical audience to be sure.