4Giola Lagoon, Thassos, Greece

Nestled on the island of Thassos in Greece, Giola Lagoon is a natural rock pool formed by centuries of wave action against the island’s coastline. This stunning swimming hole is carved into the rocks, resembling a giant natural bathtub filled with sea water. The emerald-green waters of Giola are incredibly inviting, and the surrounding cliffs provide a perfect spot for sunbathing or diving into the pool below.

Reaching Giola Lagoon requires a bit of a trek, as it’s located off the beaten path, but those who make the effort are rewarded with a serene and secluded spot to swim and relax. The dramatic contrast between the rocky cliffs and the shimmering waters of the Aegean Sea makes Giola one of Greece’s best-kept secrets.