A white-hulled sailboat with a single mast and a deployed dark reddish-brown mainsail is underway on the Tagus River, near Almada, Portugal

A white-hulled sailboat with a single mast and a deployed dark reddish-brown mainsail is underway on the Tagus River, near Almada, Portugal. The vessel travels rightward, producing a visible wake. Several individuals are present on its deck, and a Portuguese flag flies from the stern. The background displays the industrial waterfront of Lisbon, featuring at least two large red gantry cranes, numerous shipping containers, various port buildings, and a large cargo ship docked along the distant shore. Behind the industrial zone, a dark, vegetated hilly landscape is visible. The sky transitions from light blue overhead to a pale orange hue near the horizon, consistent with late afternoon or early evening light.