The cave Alystrati is very impressive and it consists of big variety of stalactites and stalagmites. The stalactites are remarkable due to the differences of their shapes and their age. The older stalactites are mainly in the galleries which are on the right side of the entrance. On the other hand the «infant» stalactites on the left side of entrance. They are the limestone tubular formations which are growing from the ceiling and downwards. Their length fluctuates between few centimeters and many meters.
The second stop will be Lake Kerkini. This artificial lake is situated 45 Km north-west of Serres and 100 Km of Thessaloniki. It was constructed in 1932 and redeveloped in 1980. It is one of the ten Wetlands of International Importance in Greece (known as Ramsar Wetlands). Lake Kerkini has multiple values in local, national and international level. It is the most essential hydro-biosphere. It is a miracle of nature that resulted from man’s technical intervention on the natural features of the Strymon River.
There is a significant variety of fauna and flora. There are lot of birds that nestle and others that find shelter in the lake during their migratory route. Some of these are included in the “National Red Catalogue”. Many of these are rare or under threat. The presence of mammals is also noticeable. The lake is surrounded by the well-forested mountains (Beles and Krousia). The existence of rare or native plants increases its ecological value even more.
A visit to the district of Lake Kerkini gives you lot of opportunities for various outdoor activities. You can go riding, cycling or walk in the footpaths of the mountain range. You can use the typical boats or canoe to approach the wet forest and watch the birds of the area. Its natural beauty, its high ecological significance and its contribution to the agricultural production of the valley of Serres, determine the lake as the main promoter of well-being and development. It is worth visiting as well as making any possible effort to preserve its wealth.