Luis Ferreira Alves/Courtesy of 4 Rooms

4 Rooms, Porto

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This Roman-era city north of Lisbon is undergoing a renaissance, thanks to a clutch of hotel openings. Take the seaside retreat 4 Rooms (1015 Rua Padre Luis Cabral; 351/929-190-406; 4rooms.org; doubles from $150), hidden away in an unmarked town house in the old Foz district. The best of the four modern suites is the white-on-white Loft, with a floor-to-ceiling window that faces a private courtyard. Extras like bath products from Anne Semonin (a brand that’s rarely found outside Paris) only add to the hotel’s cachet.

Europe's Best Affordable Hotels

4 Rooms, Porto

This Roman-era city north of Lisbon is undergoing a renaissance, thanks to a clutch of hotel openings. Take the seaside retreat 4 Rooms (1015 Rua Padre Luis Cabral; 351/929-190-406; 4rooms.org; doubles from $150), hidden away in an unmarked town house in the old Foz district. The best of the four modern suites is the white-on-white Loft, with a floor-to-ceiling window that faces a private courtyard. Extras like bath products from Anne Semonin (a brand that’s rarely found outside Paris) only add to the hotel’s cachet.

Luis Ferreira Alves/Courtesy of 4 Rooms

Europe's Best Affordable Hotels

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