The Christian Science Monitor Magazine By Doug Struck Contributor Aug. 01, 2025, 5:00 a.m. ET|Barcelona, Spain The 19-deck Costa Toscana eases to the dock and disgorges thousands of day-trippers to the souvenir shops and eateries of this old city, a 10-hour invasion of tourists that sends most locals into retreat. “I don’t go downtown. It’s a sea of people,” says Clara Galán, a tech marketing specialist in Barcelona.