The main reason to come to Garni is the Temple of Garni, the only standing Greco-Roman colonnaded building in Armenia. Built around 77 AD by King Tiridates I and dedicated to the sun god Mihr, it stands on the edge of a gorge with a drop of 300 metres to the Azat river below — a spectacular setting. Next to the temple are the remains of a Roman bath with a mosaic floor.
The Garni Gorge below is worth walking down to see the "Symphony of Stones" — a long wall of hexagonal basalt columns rising from the riverbank like the pipes of an enormous organ. A path leads steeply down from the temple site to the valley floor and the clear, cold Azat river. In the village itself, the small Mashtots Hayrapet Church is dedicated to the monk who created the Armenian alphabet. Across the gorge, visible from the temple, the ruined Havuts Tar Monastery is worth the 90-minute detour for those with time.
Garni is usually visited as a day trip from Yerevan, combined with the cave monastery of Geghard a few kilometres further up the valley.