Travel is no longer a luxury good. Airlines like Ryanair and EasyJet have contributed to a form of mass tourism that has made local residents feel like foreigners in cities like Barcelona and Rome. The infrastructure is buckling under the pressure. By DER SPIEGEL Staff

"It doesn't take long before the woman at the hotel reception pulls out a city map of Porto. Look, she says, there's the Old Town and the Douro, there's the harbor and here, by the way, the pride evident in her voice, is the world's most beautiful bookshop: Livraria Lello...

Travel is no longer a luxury good. Airlines like Ryanair and EasyJet have contributed to a form of mass tourism that has made local residents feel like foreigners in cities like Barcelona and Rome. The infrastructure is buckling under the pressure. By DER SPIEGEL Staff

"It doesn't take long before the woman at the hotel reception pulls out a city map of Porto. Look, she says, there's the Old Town and the Douro, there's the harbor and here, by the way, the pride evident in her voice, is the world's most beautiful bookshop: Livraria Lello...