Quiz a resident on what the most iconic structures in town are and they'll probably mention Yerevan TV Tower. It's one of the first things your eyes will be drawn to when you start your sightseeing.
Situated in Nork-Marash, this modern piece of architecture is worth a look. But you'll find plenty more to discover in this area. Republic Square, Yerevan Cascade, and Yerevan Opera Theatre aren't too far from Yerevan TV Tower.