Tnjri, Remarkable tree in Martuni Province, Azerbaijan.

Tnjri is a giant Oriental plane tree on the eastern slope of a gorge in the Main Caucasian Mountain Range near Skhtorashen. Its trunk measures 27 m in circumference and rises over 54 m, with foliage covering 1,400 m². A hollow of 44 m² can hold more than 40 people.

Tnjri is a 2045–2046-year-old Oriental plane tree. At least two centuries ago lightning struck it and badly damaged the trunk, leaving a hollow of 44 m². In the Soviet era the tree was issued a passport as the oldest and tallest tree in the USSR. It stands by the Tengru spring, which irrigates it.

Tnjri is a local shrine for the people of Skhtorashen and a stop for pilgrims visiting Artsakh. Its name comes from the Karabakh dialect word tnǰri, meaning 'plane tree'. The tree has been visited by Mesrop Mashtots, Movses Khorenatsi and Sayat-Nova.

The tree stands on the eastern slope of a gorge in the Main Caucasian range, by the village of Skhtorashen, next to the Tengru spring that irrigates it. The spring supplies water year-round, so the ground around the trunk stays damp. The hollow, 44 m² in area, can be entered on foot.

In Soviet times the tree was issued a passport as the oldest and tallest tree in the USSR. Its 44 m² hollow can hold more than a hundred people, and its foliage covers over 1,400 m², exceeding the plane trees of Kos and the Firyuza gorge near Ashgabat.