Yerevan is such a beautiful city. You feel like you are back in Ancient times when you are in the city and you have the magnificant view of Ararat Mountain. I found myself constantly in the outdoor cafe's just relaxing, reading a book and enjoying the scenery. Truly a beautiful settting as it is surrounded from virtually all sides by mountains.

Everything... Kavkaz (Caucasus) mountains, churches, excellent food but you need a car for transport :/ 
And surprisingly quite good beer (Kilikia)

In the Matenadaran Manuscript Museum worths to hear the guide he says soooooo many interesting stuff about them.