blurred wooden fence on a trail by the river and bridge from livraria do mondego, penacova portugal

waterway bridge river transport infrastructure tree pond stream watercourse water viaduct valley blurred wooden fence trail from livraria mondego penacova portugal geological fresh reflection formation escarpment quartzite library erosion mirrored countryside season cloudy bank village bookstore cliff geology range mountain tourism structure scenic hill green walking destination travel landscape natural nature park environment outdoor backpacking coimbra wood pathway portuguese europe banks vegetation reflected