(2010) Great Wonders of the Modern World: Hadrian's Wall

74 miles long and 2,000 years old, Hadrian's Wall winds over the hills and valleys of Northern England, marking the northernmost extent of a once mighty empire. Built of stone and mortar, Hadrian's Wall stands in mute testament to its long-ago builders and is a tantalising treasure that still holds many secrets archaeologists and historians are eager to uncover.