The small volcanic uninhabited island of Psathoura has a lighthouse built in 1895 that is 28.9 meters high, one of the tallest in the Aegean. It flashes once every 10 seconds. The remains of an ancient city lie underwater beside the island.
There is a sad story connected to winemaking on Alonnisos, whose economy was stoked by lush vineyards and quality wines since ancient times, up to the early 1960s.
Alonnisos is one of the greenest islands in Greece with fabulous Mediterranean diversity. The most common are coniferous trees with a strong green color, followed by holly or kermes oaks, small bushy trees that are quite different from European oaks. The Arbutus or strawberry tree is also common on the island, bearing small bell-shaped flowers and berry-shaped fruit (not strawberries!).
On the island of Kyra Panagia off Alonnisos there is a monastery with an old olive press inside. The island falls in Zone A of the Marine Park, so a trip there will reveal much nature.
Two small churches 4km from Patitiri on a forested seaside cliff with great views. One is an old byzantine church and the other is the newer version meant to replace it after the earthquake. You must walk the last 500 meters.
Visit this secluded church in the middle of the island by car, almost 11km from Patatiri and enjoy the breathtaking views from here at a height of 350 meters, which looks out to the island of Skyros on a clear day. Feast: April 23.
About 12km from Patitiri and looking out to Skopelos, this church is almost hiddent in the woods of the ravine. Park near the shepherds' settlement and walk down to the chapel. A path from here can take you to Ayios Yiorgios church. Feast: May 21.
There are several small and big churches dotting the landscape, and many are secluded. On the northside of the island, between the old town and Patitiri you will find many churches such as Profitis Ilias, Agios Fanourios, Metamorfosi, Agios Andreas, Taxiarches, Panagia sto Vouno (Our lady in the mountain). In the old town check out Kimisi Theotokou.
Alonnisos is known for the Mediterranean monk seal Monachus Monachus that swims around its water. The monk seal is also one of the most endangered animal species in Europe, making its presence on the island even more precious. Only 400-500 are said to survive today, with two thirds of them estimated to be in Greece, particularly in the Marine Park of Alonnisos.
These 3-floor museum has a large collection from different eras. There's a folklore exhibition in the basement, a military exhibition on the ground floor portraying Greece's troubled history, an adjacent section on ancient finds, and an eclectic collection on the first floor.