Marathonisi is a small green turtle-shaped island with a wonderful view of Laganas Bay.

Towards the side of Laganas beach is an extraordinary seaside with white sand while beautiful sea caves are found towards the back of the island. The deep blue waters are combined in perfect harmony with the lush green landscape and golden sand.

The beach is extremely important to the reproduction process of the loggerhead sea turtle caretta-caretta due to the density of nests there. For this reason the National Marine Park of Zakynthos has been established for the protection of the natural environment.

The marine park protects and conserves the natural landscape of the island of typical Mediterranean vegetation and endemic flora; endangered species of migratory birds; and habitats and the Mediterranean monk seal Monachus monachus population.

Bathers can visit the island by boats or small vessels.