Traditional Rabelo Boats at Dom Luís I Bridge, Porto, Portugal

Rabelo boats, traditional Portuguese vessels used for transporting Port wine along the Douro River, are moored by the historic Dom Luís I Bridge in Porto. These flat-bottomed boats feature masts that once carried sails but now serve mainly as decorative elements or to hoist cargo. In the background, the iconic bridge arches gracefully over the river, connecting the city's two sides against a backdrop of terracotta rooftops nestled among lush greenery under a serene blue sky dotted with wispy clouds.