Kresna Gorge (Bulgarian: Кресненско дефиле) is a steep valley in south-western Bulgaria, stretching about 18 km (11 mi).

Kresna gorge has a rich biodiversity, which has come under pressure from the Struma motorway construction project, a new leg of the Trans European Corridor No.

Some species of birds, such as cormorants, may not nest and breed in the gorge, but are utilizing its resources as part of longer passageways and migratory routes.

The resources provided by the gorge are crucial, and serve as the main resting sites to threatened and rare species such as the Egyptian vulture.

The Struma motorway, a project that is part of The European Transport Corridor No IV, is planned to cut through the Kresna Gorge.

[10] The European Union financed both the Bulgarian government to build the motorway and the environmental groups that defend the endangered nature through construction.