Ilam Province attracts those who are interested in Geotouirsm due to its unique geomorphology and geology. Geological formations of Ilam are divided into northeastern and southwestern formations.
Following formations are located in northeastern parts of Ilam:
- Servak Formation: Bangestan group including white-gray limestone and marly limestone. This formation dates back to Early to Late Cretaceous
- Surgah Formation: Bangestan group including dark shale and calcareous beds of Late Cretaceous
- Ilam Formation: Including white limestone of Late Cretaceous
- Gurpi Formation: Including dark gray shale
- Pabdeh Formation: Including dark shale and marl associated with calcareous veins; they were deformed as Tashkan Formation and Shahbazan Limestone in eastern parts of Ilam. They date back to Paleocene-Oligocene. In most parts, Asmari Limestone is seen on Pabdeh Formation. Also, there are thin evaporative units called Kalhor Formation in some parts between Asmari Limestone and Pabdeh Formation.
Asmari Formation is seen in southwestern part of Ilam province. It includes cream limestone and dates back to Early Oligocene-Early Miocene.
Geological phenomena, hot water springs and local mountains attract different tourists from around the world.
Also, rivers which are usually originated from surrounding mountains create beautiful landscapes.