Its decoration includes, in addition to large stalactites and stalagmites in various colors and the rare eccentrics. Eccentrics or helictites are rare formations that are created by "defying" the laws of gravity and following irregular paths.

Kerkini lake is an artificial lake. It was created in 1932 with the construction of a dam on the river Struma near the village of Lithotopos.Η  λίμvη Κερκίνη ειναι μια τεχνητή λίμνη. Δημιoυργήθηκε τo 1932 με τηv κατασκευή εvός φράγματoς στov πoταμό Στρυμόvα κovτά στo χωριό Λιθότoπoς.

Kerkini lake is one of the 10 Wetlands of International Importance in Greece (also known as Ramsar Wetlands).

At least 300 species of birds have been observed in the lakes and the bays that surround them, of which 50 are included in the Red List of the Birds of Greece. A total of 10 species of birds nest in mixed colonies in the riverside forest, in significant numbers for Greece and Europe.
In the area of ​​Lake there is the largest number of buffaloes in Greece, which are animals adapted to living in wetlands.

The biodiversity of the area is very great. In addition to birds, the presence of other species such as amphibians (11 species), reptiles (26 species), mammals (>58 species), fish (30 species), plants (>800 species) and invertebrates (at least 4700) is also important.

It runs over a length of 6 km from east to west.

In the Valley of Agioi Anargyroi there are many sports facilities such as the indoor swimming pool that stands out from the architectural construction and the indoor gym of Serres where various competitions are held (local, national, pan-European, etc.).

The Valley of Agioi Anargyroi offers the visitor good food and endless entertainment. Along the entire length of the street there are entertainment and catering centers such as cafes, taverns, restaurants, cinemas and bars that operate in the summer months providing enjoyment and refreshment.