there are 29 stops along thejourney, covering more than 180 years of african american history. you have freedom seekers travelling from south further north and this being a point of salvation in terms of like being able to stop somewhere and then be guided further up north in a safe space. it s estimated that tens of thousands of escaping enslaved african americans used the underground railroad to push north and finally cross the border into what was then known as british north america, or modern day canada, and freedom. the indiana avenue bridge was built by george dawson and his sons who were abolitionists