Alonnisos National Marine Park

The National Marine Park of Alonnisos and Northern Sporades is one of Greece's most remarkable natural attractions and the largest marine protected area in Europe. Covering more than 2,200 square kilometres, it is famous for its crystal-clear waters, secluded islands, rich marine life and the endangered Mediterranean monk seal (Monachus monachus), making it one of the best places for wildlife watching in the Mediterranean.

Established in 1992 as Greece's first marine park, the protected area safeguards a unique ecosystem of marine and terrestrial habitats, while also preserving important archaeological and historical sites. The park includes Alonnisos, Peristera, Kyra Panagia, Skantzoura, Gioura, Piperi, Psathoura and several smaller islets, many of which remain completely uninhabited.

One of the park's biggest attractions is the Peristera Underwater Museum, home to one of the world's oldest known shipwrecks. Certified divers can explore the ancient Peristera wreck, while non-divers can experience it through virtual reality exhibits at the Information Centre in Alonnisos.

Exploring the park by boat tour from Alonnisos is one of the most popular things to do in Alonnisos. Daily cruises visit remote beaches, sea caves and unspoilt islands, offering opportunities for swimming, snorkelling, wildlife photography and, with a little luck, spotting the rare Mediterranean monk seal in its natural habitat. The park is also an excellent destination for kayaking, birdwatching and nature lovers seeking some of the most pristine landscapes in the Sporades.

To protect its fragile ecosystem, access to certain islands and protected zones is restricted, while organised activities are carefully managed. Visitors are encouraged to respect conservation regulations to help preserve one of the Mediterranean's most valuable marine environments.