I've only been to Salzburg for half a day (on the way to Munich from Vienna), so I can't really be a good judge of the city. But I thought it was a lovely place. The "Old Town" is very nice... If you've watched "The Sound of Music", you can visit some of the places filmed in the movie (ie: Mirabell gardens). You can also visit Mozart's birthplace / residence... The Hohensalzburg Fortress is the largest fully-preserved fortress in central Europe... St. Peter's cemetery is one of the oldest in the world.. Just research online for things to see/do there. There's lots of stuff out there! Here's some: http://www.visit-salzburg.net/ http://www2.salzburg.info/ http://www.salzburg.com/tourismus_e/ I'm sure you and your friend will have lots of fun :D

It will only be boring if you make it so. You're in a new city for a week - I'm sure you and your friend will find ways to have fun.