Europe's best-known tourist attractions are struggling under a surge of summer visitors, with travel experts warning that popular destinations are reaching capacity earlier each year and are increasingly unable to cope. Landmarks including the Acropolis in Athens, the Trevi Fountain in Rome and the Vatican have all seen dense crowds during peak periods, with the strain compounded by another European heatwave. The overcrowding matters because it threatens both the visitor experience and local infrastructure, prompting warnings from industry figures and international bodies about the sustainability of current tourism levels.

International arrivals to Europe rose five per cent in 2026 compared with the previous year, according to the European Travel Commission, with Spain alone expecting 100 million tourists this summer, its strongest season on record. Analysts partly attribute the rise to holidaymakers switching from destinations such as Turkey, Cyprus and Egypt due to the conflict in the Middle East. Viral social media footage has shown packed trains to Lake Como, long ferry queues there, crowded coach queues at the Dolomites' Tre Cime, and overwhelmed crowds at the Vatican and Acropolis, while the OECD has warned that concentrated visitor flows are placing unsustainable pressure on infrastructure and communities in some destinations.