We don't like to brag, but when it comes to Het Concertgebouw, we kind of have to. Opened in 1888, this concert hall has seen it all (including shows from Pink Floyd and Led Zeppelin) and come out on top. Acoustically, it's one of the best in the world, right up there with Boston's Symphony Hall and Vienna's Muzikverein. And there's no shortage of chances to catch a show: with more than 900 events a year (for a total of more than 700,000 people each year) it's one of the most visited concert halls in the world. Pretty cool for classical, right?