Connecting Turkey's European and Asian shores, the 1915 Canakkale Bridge was built by Turkish and South Korean firms with an investment of €2.5 billion ($2.8 billion). It has the longest main span -- the distance between the two towers -- of any suspension bridge in the world. Such mega projects have been central to Erdogan's achievements since his AK Party first came to power in 2002, including a new Istanbul airport, rail and road tunnels beneath Istanbul's Bosphorus strait, and a bridge over it.
"These works will continue to provide profit for the state for many years," Erdogan said at an opening ceremony on the anniversary of a 1915 Ottoman naval victory against French and British forces in the Dardanelles during World War One. "These projects have a large share in putting our country ahead in investment, workforce and exports," he said.
Last year he launched what he previously called his "crazy project": a $15 billion canal in Istanbul intended to relieve pressure on the busy Bosphorus Strait. However critics have questioned the project's viability given Turkey's economic woes, environmental risks and public opposition.