An interior view depicts a pedestrian stone tunnel, identified as an access route for the Funicular del Río de la Pila in Santander, Spain

An interior view depicts a pedestrian stone tunnel, identified as an access route for the Funicular del Río de la Pila in Santander, Spain. The tunnel features an arched ceiling and walls constructed from large, irregular stone blocks, presenting shades of grey, brown, and ochre. Extensive dampness is evident on the stone surfaces, accompanied by patches of green moss or algae growth, primarily along the upper sections of the walls and ceiling. A series of bright, linear fluorescent or LED light fixtures are mounted along the curve of the tunnel's ceiling, providing illumination and casting reflections in wet areas. On the lower left wall, a distinct red rectangular utility box with a ribbed front panel is affixed. Immediately above this box, a smaller, partially obscured red and white sign is visible. The floor consists of a flat, grey concrete pathway, segmented by expansion joints. Several dark, irregularly shaped puddles or wet patches are present on the concrete surface, reflecting overhead light. The tunnel extends into the distance, curving slightly to the right, and is devoid of any individuals, subjects, or active elements.