6Santorini, Greece

Santorini’s whitewashed houses and caldera views attract millions of visitors each summer, but the island is struggling under the weight of its popularity.

The port is often flooded with cruise passengers, creating congestion in Fira and Oia. Locals worry that infrastructure, from water supplies to roads, is overstretched. Residents also feel squeezed by the explosion of short-term rentals, which push housing costs beyond reach. While tourism is the island’s lifeblood, many locals are openly frustrated with the lack of balance.

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