Kaghsi is a village in Kotayk province, 45km away from Yerevan. The cliff here is located at the end of the village, right next to the dirt road with easy access. With a bunch of routes here, from 4a to 6b+, both trad and sport, developed by Luca Kueshguerian, you can call it a perfect place for half-day climbing and chilling or to take your students to coach. As well, you might have a chance to book a cute village house with an amazing garden right next to the crag, called Tunik Bunik. Just make sure to book it beforehand as the house is often occupied by tourists and guests.
Click on this link to navigate to the crag. Have fun!
P.S. On the route Kosmopolito, there is a viper nest from the left of the 6th bolt, be careful!