"I want to go back to Syria. There is war in my country, but we've been living for seven months in Greece like prisoners."

Adan, from Aleppo, has abandoned his dream of building a new life in Europe, like thousands of other Syrians trapped in Greece.

He's just arrived at the station in Didymoteicho, a village near the Greece-Turkey border, with his wife, three children and five other relatives, and is preparing to go through a police checkpoint before trying to get into Turkey, the start of a long journey home.