Along with Milan's La Scala, New York's Metropolitan, and the Palais Garnier in Paris, this is one of the world's greatest opera houses. The resident troupe has mounted spectacular productions in the past, though recent productions have tended toward more contemporary operas. Whatever the style of the performance, the extravagant theater—also home to the famed Royal Ballet—delivers a full dose of opulence. Tickets range in price from £3 to £235. The box office opens at 10 am, but lines for popular productions start as early as 7 am; unsold tickets are offered at half price four hours before a performance. If you wish to see the hall but are not able to procure a ticket, you can join a backstage tour (£12) or one of the infrequent tours of the auditorium (£9.50).