Set on the summit of steep mountains 40 kilometres north of Şirvan, İrun Kalesi keeps one feature worth the journey: an underground tunnel connects it to the river running along the foot of its mountain.
When to go
- Climate
- Across Siirt as a whole, monthly mean temperatures run from 2.8 °C in January to 30.7 °C in July; the mean stays between 15 and 25 °C in May and October; rainfall is heaviest in March (112 mm) and lightest in August (2 mm). Long-term means for 1939-2025 from the Turkish State Meteorological Service (MGM).
