Khachkar is one of the most widespread architectural elements in Armenia. It is a flat, vertically positioned stone block with a curved stone on the western side. Inscriptions were usually made on the khachkars. In their form and construction khachkars go back to hoar stones of the epoch of Urartu State and pagan Armenia. Famous masters, creators of khachkars are Timot and Mkhitar, Momik and Vardan, Arakel and Melikset.
One of the most popular architectural compositions of Yerevan is the so called Cascade - another masterpiece of Alexander Tamanyan, famous Armenian architect. It is a system of fountains, flower beds and step junctions, than connects the Northern and the Central parts of the city. The absolute height difference between the first and the last steps is 100 meters, and the length and width of the construction is 500 and 50 meters accordingly. Escalators of the Cascade allow rising to the main observation platform of Yerevan.
You can learn more about the characteristics of Armenian architecture by visiting the National Architecture Museum in Yerevan.