Thessaly, known for its rich historical landmarks and picturesque landscapes, might not be the first location that springs to mind when thinking of diving in Greece. However, its coastal regions provide an unexpected underwater paradise, with vibrant marine life, intriguing shipwrecks, and captivating underwater landscapes.

The Caves of Skopelos: This island, part of the Northern Sporades in the Thessaly region, is home to a network of underwater caves that beckon experienced divers. The labyrinthine nature of these caves presents a thrilling diving experience, illuminated by the intermittent rays of sunlight.

Alonissos Shipwrecks: Also part of the Northern Sporades, Alonissos is surrounded by ancient shipwrecks. While some are protected archaeological sites, certain wrecks are accessible and present a historical journey for divers.

Agios Ioannis Beach: Known for its crystal-clear waters and calm conditions, this spot near Pelion is ideal for beginners. Schools of colorful fish and a sandy seabed make for a serene diving experience.

Skiathos Reefs: Another gem from the Northern Sporades, the waters around Skiathos offer shallow reefs bustling with marine life, providing a perfect and safe environment for novice divers.

Divers in Thessaly can expect to see a myriad of Mediterranean marine life. Seahorses, octopuses, starfish, and a variety of fish species like parrotfish, damselfish, and grouper frequent these waters. The biodiversity here is a testament to the relatively untouched nature of Thessaly's underwater realms.

Diving conditions in Thessaly are optimal from late spring to early autumn. Water temperatures during this period range from about 64°F to 77°F (18°C to 25°C). Visibility, especially in the Sporades islands, is generally excellent, often exceeding 30 meters.

Diving costs in Thessaly are comparable to other parts of Greece. A typical boat dive might set you back between $60 and $100. Many diving centers offer package deals, equipment rentals, and certification courses for those looking to begin their diving journey.

In conclusion, Thessaly offers a blend of history, natural beauty, and underwater wonders. While it might be overshadowed by more renowned diving locations in Greece, its dive sites, teeming with life and mystery, are well worth the exploration.