Visit Porto, Portugal's second-largest city. Explore the historic Ribeira district (UNESCO World Heritage site with colorful houses along the Douro River), taste Port wine at a cellar in Vila Nova de Gaia (like Sandeman or Graham's), admire the intricate azulejo tiles at São Bento railway station (over 20,000 tiles depicting historical scenes), and cross the iconic Dom Luís I Bridge (designed by a student of Gustave Eiffel).
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