MADRID — Suitcases rattle against cobblestones. Selfie-snappers jostle for the same shot. Ice cream shops are everywhere. Europe has been called the world’s museum, but its record numbers of visitors have also made it ground zero for concerns…
MADRID — Suitcases rattle against cobblestones. Selfie-snappers jostle for the same shot. Ice cream shops are everywhere. Europe has been called the world’s museum, but its record numbers of visitors have also made it ground zero for concerns…