The town of San Basilio, Colombia was the first town in the Americas founded by former slaves. 400 years later, its residents still hold on to their African roots.

Researchers in St. Catharines, Ont., are working to unearth the lost gravestones of people who fled slavery in the U.S. 100 years ago. CBC’s Nick Purdon visits the project site and learns that keeping the stories of freedom seekers alive...