but this CNN article is a deep dive into the situation in Europe, with a few suggestions.
One callout:
In 2024, Europe’s tourism numbers reached new heights, with foreign arrivals surpassing 2019 figures, with a year-on-year increase of 12% since 2023. Portugal, which also has struggled with overtourism challenges, saw a 26% increase in arrivals in 2024 — and its popularity shows no signs of waning, as the country continues to rank high on lists of best countries to visit.
https://www.cnn.com/travel/overtourism-2025-summer-crowded-chaotic/index.html