Gonio Castle is a historical Ottoman castle located in the northern part of historical Batumi, specifically in the Adjara region, and although most of the ruins at the present time are wrecks, it is really worth a visit, as you will be accompanied on the trip by a professional tour guide who will explain to you about each part From the castle, he will help you imagine what it used to be like, and he will explain to you about its impact on Georgian rule. Inside the castle lies the tomb of the supposed apostle Matthias, and there is also the oldest fortress in Georgia, "Fort Gonio". The castle is located 15 km from the city of Batumi, and you can reach it by public transport.