With apologies to Matt Lauer (and Carmen Sandiego, for that matter), where in the world is ED? For Entertainment Design's annual special report on architecture, we're all over the map, making stops at three diverse projects that combine sleek design with state-of-the-art acoustics, lighting, and rigging. All you have to do is guess where we're going.

Our first stop is a mixed-use, 1,611-seat venue that opened last year. Designed by the Miami firm of Arquitectonica, the space features an exterior facade made up of Chassagne, a limestone dug up from local quarries. Not sure where this tres chic venue is located? Don't worry if you can't cut the mustard, just turn the page and find out.

Our next stop might want to make you shout yodelay-hee-hoo from the highest Alp. This 1,840-seat concert hall, designed by architect Jean Nouvel, opened in August of last year and features an intriguing acoustical design by Artec Consultants. This project is anything but cheesy, and to find out more, turn to page 26.

Last, but certainly not least, our third stop is an 806-seat venue that's slightly smaller in size but just as ambitious as the first two sites. Terence Williams of Wade Williams Young + Wright served as the architect, Auerbach + Associates served as consultant, and Dennis Paoletti was the acoustician. Our only clue on this is: it was done in BC, and we're not talking prehistory. Still can't figure it out, eh? Turn to page 27 for the answer.