There are quite interesting sights to be found in Sidirokastro, such as the ruins of the Byzantine castle, the Agios Dimitrios church that is carved in rock, and the quaint bridges over the Krousovitis River.
The Issari Fort, built by Emperor Basil II. Standing 155 metres tall, it towers over the town's northwest side. The town owes its name to this fort: "Sidirokastro" means "iron castle" in Greek, as does "Demir Hisar" in Turkish.
The beautiful wetland habitat of the artificial lake Kerkini, created by a dam on the Strymonas River. This singular habitat, protected by the RAMSAR Convention on Wetlands, is Greece's natural frontier with Bulgaria. It is one of the richest fowl habitats
in Greece: home to more than 300 species.
The Sidirokastro Hot Springs have a temperature of 45°. They are just outside the town to the north, near the Strymonas River railway-bridge, on a hill that offers panoramic views of the area. Thousands of people go to these hot springs every year, both for
recreation or therapy, especially since the recent renovation of the area's tourist facilities. There are more hot springs in Thermes and in Angistro.
Roupel Fort, which was a stronghold against the German-Bulgarian army in WWII.
The botanic forest-park and the aquarium at Vyronia.
The ski resort in Lailia, one of north Greece's finest, is open all year and can accommodate a large number of visitors. It is great for winter sports and a place of natural beauty.
The town's greatest annual festival is on 27 June, celebrating the area's liberation from Ottoman rule in 1913. It is an anniversary the locals celebrate with reverence, emotion and pride.
Mihalis Tsartsidis Folklore and History Museum (Sidirokastro)
