Two trails of ancient human footprints pressed into a beach in Morocco form one of the largest and best-preserved trackways in the world.

Researchers happened upon the footprint site near the northern tip of North Africa in 2022 while studying boulders at a nearby pocket beach, according to a study published Jan. 23 in the journal Scientific Reports.

“Between tides, I said to my team that we should go north to explore another beach,” study lead author Mouncef Sedrati, an associate professor of coastal dynamics and geomorphology at the University of Southern Brittany in France, told Live Science. “We were surprised to find the first print. At first, we weren’t convinced it was a footprint, but then we found more of the trackway.”