Greece is moving ahead with a network of heavily fortified migrant detention centres, including a vast new compound on the island of Lesbos that is designed to hold up to 5,000 people, even as courts and local authorities challenge the projects.
The Lesbos site, known as Vastria, would dwarf Amygdaleza, the mainland facility often described as Greece’s main “Alcatraz” with a capacity of roughly 1,000 detainees. Greek government rhetoric has framed large-scale detention as a response to what officials describe as an invasion of people arriving from Africa, South Asia and the Middle East, and some of the new facilities have been likened in public reporting to hardline, Trump-era approaches to immigration enforcement.
Journalists who visited Amygdaleza and other sites reported barbed wire, spartan conditions and very high daytime temperatures inside the compounds, with some detainees facing prolonged stays without full access to sanitation. Local and municipal leaders on Lesbos have publicly opposed the Vastria project. “We don’t believe such mass facilities are needed here,” Panagiotis Christofas, mayor of Lesbos’ capital, told the Associated Press, calling the chosen location “the worst possible.”
Construction on Vastria is reported to be nearly complete but the facility has been kept closed by court challenges brought by local governments, residents and advocacy groups. Those legal actions have delayed use of the site even as national authorities argue that larger, more secure facilities are needed to manage migration flows and reduce chaotic arrivals across the Aegean islands.
Amygdaleza, located about 40 minutes from Athens, and Vastria are part of a broader shift in Greek policy toward centralized, high-security holding centres intended to process, detain and, when applicable, deport migrants. Officials say the approach aims to restore order to an island reception system long strained by periodic surges of arrivals. Critics counter that large-scale, remote detention raises health, legal and humanitarian concerns and risks creating long-term warehousing of vulnerable people.
Court rulings and appeals have become a recurring feature of the rollout. Judges have temporarily barred the opening of new sites while assessing environmental approvals, land use and procedural conformity. Local governments have also pursued administrative and legal avenues to block or limit operations. Those judicial interventions echo litigation seen elsewhere, including in the United States, over the legality and conditions of large migrant detention facilities.
Human rights groups and lawyers who monitor migration policy have publicly urged Greek authorities to ensure detention standards meet national and international obligations, including access to adequate sanitation, shade and medical care. Greek officials have said they are working to improve reception capacities while expediting asylum procedures, but detailed timelines for the possible opening of Vastria have not been made public.
The debate over Vastria and other fortified centres illustrates a deepening policy divide in Greece: national leaders advancing tougher containment measures to manage migration, and local communities and courts pushing back on grounds of legality, humanitarian impact and local environmental and social cost. For now, the Lesbos complex stands completed but shuttered, its future hinging on ongoing legal challenges and political negotiations.