The layered rock formations in the region are colloquially referred to as 'Painted Hills' due to their resemblance to the badlands of the American West.
The sanctuary is situated at the intersection of the Ankara, Bolu, and Eskişehir provincial borders.
It was officially declared a Wildlife Development Area in 1994 to protect endangered migratory bird populations.
The site experiences significant water level fluctuations throughout the year due to its proximity to the Sarıyar Dam.
The Aladağ Stream brings high concentrations of minerals to the reservoir, which contributes to the formation of the distinctive colorful soil bands.
The Nallıhan Bird Sanctuary is located on the banks of the Aladağ Stream where it meets the Sarıyar Dam reservoir. It serves as a vital wetland ecosystem along a major migratory route for waterfowl and birds of prey. The surrounding landscape is characterized by unique, colorful sedimentary rock layers known as the Davutoğlan strata. The sanctuary provides a habitat for over 170 bird species, including the black stork and the ruddy shelduck. A dedicated wooden observation tower allows visitors to view the marshland without disturbing nesting sites. The area is part of a larger geological formation that displays distinct bands of red, yellow, and gray soil deposits. Despite its classification as a protected wetland, it remains accessible for birdwatchers and nature photographers throughout the year.
The elevated observation tower providing a panoramic view of the layered hills and the dam water.
Bring high-quality binoculars or a camera with a telephoto lens to observe birds from the designated viewing platforms.
Wear sturdy, closed-toe footwear as the terrain near the water's edge can be muddy and uneven.
Visit during the early morning hours to coincide with peak bird activity and to avoid the strongest midday heat.
Do not attempt to walk directly onto the muddy banks or marshes as these areas are unstable and sensitive to disruption.
Maintain silence near observation points; avoid approaching nesting areas; do not leave litter in the protected wetland.
