This vertical photograph captures a turbulent mountain river flowing through a forested valley in Beli Iskar, Bulgaria

This vertical photograph captures a turbulent mountain river flowing through a forested valley in Beli Iskar, Bulgaria. The river, occupying the central and lower portions of the frame, exhibits significant white rapids and foam, indicating a swift current over rocks. The water itself appears a light, milky green. On the left bank, dense coniferous trees, primarily tall, dark green evergreens, ascend the steep slope. Closer to the river, lighter green deciduous trees with pale trunks are visible. The right bank also features a dense coniferous forest, with a stone retaining wall constructed along the water's edge in the foreground, interspersed with green shrubs and grass. The sky above is partially cloudy, showing patches of blue sky amidst large, bright white and darker grey clouds. Several thin, dark power lines or cables stretch horizontally across the upper third of the image, traversing the sky and passing above the treetops. No people or animals are visible in the scene.