Hungary and Croatia continue to turn away migrants

Each episode will feature amazing engineering facts about unique structures and systems including the Sir Adam Beck Hydroelectric Generating Stations at Niagara Falls, the Montreal Metro - one of North America's largest urban rapid transit schemes, and the Palm Springs Aerial Tramway in California, the largest rotating aerial tramway in the world. The series will introduce viewers to some remarkable characters who shoulder huge responsibility maintaining them on a daily basis to keep the general public safe.