is a north region of Greece, bordering with the countries of Bulgaria and Macedonia. A very small part of the region faces the sea, near the Ancient Amphipolis where remnants of old fortification and bridge still exist. The capital of Serres is the town of Serres. Points of interest for tourists in the region are the Alistrati Cave and Lake Kerkini
. Lake Kerkini is a hydrobiosphere, home to various kinds of fish, water lilies and many migrating birds, some of which are rare and protected. 28 km away from the town of Serres there is a small ski center - Lailias, with 3 ski pistes and 2 lifts.