Biggest dinosaur footprint site in the U.K. discovered by researchers: "So surreal"

British researchers have unearthed some 200 dinosaur footprints dating back 166 million years in a find believed to be biggest in the United Kingdom.

Teams from Oxford and Birmingham Universities made the "exhilarating" discovery at a quarry in Oxfordshire in central England after a worker came across "unusual bumps" as he was stripping clay back with a mechanical digger, according to a new BBC documentary.

"This is one of the most impressive track sites I've ever seen, in terms of scale, in terms of the size of the tracks," said Prof Kirsty Edgar, a micropaleontologist from the University of Birmingham, told BBC News. "You can step back in time and get an idea of what it would have been like, these massive creatures just roaming around, going about their own business."