Tourists ride on a ferry crossing the Huangpu River towards the Lujiazui Financial District.

Tourists ride on a ferry crossing the Huangpu River towards the Lujiazui Financial District.

Tourists ride on a ferry crossing the Huangpu River towards the Lujiazui Financial District.

A view of a ferry off Istanbul's historic peninsula, home to the Hagia Sofia and other cultural attractions from a commuter ferry at dusk.

A view of Istanbul's maiden's tower with the business district of Levent in the background, from a commuter ferry at dusk.

A view of Istanbul's maiden's tower with the business district of Levent in the background, from a commuter ferry at dusk.

A view of Istanbul's historic peninsula, home to the Hagia Sofia, Blue Mosque and other cultural attractions from a commuter ferry at dusk.

A view of Istanbul's historic peninsula, home to the Hagia Sofia, Blue Mosque and other cultural attractions from a commuter ferry at dusk.

A mother and a child desembarking from a ferry bringing refugees from Ukraine.

Istanbul's historic quartre seen from a deserted passenger ferry during a nationwide weekend coronavirus curfew.

Istanbul's historic quartre seen from a deserted passenger ferry during a nationwide weekend coronavirus curfew.

Istanbul's historic quartre seen from a deserted passenger ferry during a nationwide weekend coronavirus curfew.

Istanbul's historic quartre seen from a deserted passenger ferry during a nationwide weekend coronavirus curfew.

A Syrian family walks to a ferry heading to Athens from the Greek island of Kos, a major entry point for irregular migrants over the past months.

Migrants and tourists walk to a ferry heading to Athens from the Greek island of Kos, a major entry point for irregular migrants over the past months.