The Isthmus of Grya is a strip of land that unites Southern and Northern Ithania; to the North, you will find Diamyane, Sennon; and to the south, you will find the coasts of Avven. The Isthmus separate two bodies of water. If ships want to pass from one side to another they need to pay a fee for somepeople to raise your boat and move it to the other side. Recently, a group of thieves unearthed one of the many tunnels that go under the Isthmus. They offered ships a quick, free way to pass through, but, when they neared the other side, they would rob them.