Lisbon

Portugal is, overall, a less expensive place to visit than neighboring Spain. The country's capital city, Lisbon, is no exception, yet it offers ample attractions on par with top European spots: sweeping sea views, cosmopolitan beaches, ancient cobblestoned streets, Gothic cathedrals. The cost of a night's stay in a four-star hotel averages $130, according to TripAdvisor. In addition, The New York Times reports that many Lisbon cultural attractions offer free admission on Sundays, including the Museu Nacional de Arqueologia and the Torre de Belem, a historical fortress.