The new $3.4 billion barrier consists of reinforced concrete slabs measuring 4 metres high and 1.1 metres thick, with a razor wire topper.

Credits: Unsplash; Author: Red Dot;

This wall is set to be finalised in three years, spanning over 900 kilometres, with up to 75km completed to date, and more than 300km under construction in northern Iran’s Razavi Khorasan province.