Once a month in de Stopera of Amsterdam you can listen to beautiful arias from different operas. The mezzosoprano Mylou Mazali gives a brief explanation about the songs you are going to hear. Every month there are different operas and different opera singers. They also perform arias from not so well known operas, like Djamileh by Bizet.
When I was there they performed one of my favorite arias, Nessun Dorma from Turandot by Puccini. So if you like arias or if you want to get acquainted in an accessible way with opera and arias. Go see Opera per Tutti in the Stopera in Amsterdam. The agenda is on their website.