Mathraki is the smallest of the Diapontian islands. Its shores form small bays with Ammos and Apidies being the two most significant ones. Both of them serve as harbours for the small caiques, which connect the island with Corfu. The island has fine-sandy beaches, while the reefs and the rocky islets around it attract the fishing boats from all over the region. At the two ends of the island are located the two villages, Ano Matrhaki and Kato Mathraki.