We visited Anniston on our way to Texas earlier this year. We stayed a few days at a local RV parks so that we could visit the area and see what it had to offer. The Anniston Civil Rights Trail starts at the Greyhound Station where in 1961 Freedom Riders were attacked by a mob. This site is hosted by NPS (National Park Service). The inside of the terminal was closed the day we were in town but there is a kiosk where you can listen to surviors of this attack tell their stories of the day.
I thought this was a well organized driving tour. You download a .pdf document that will show you how to get to each location. All have markers that clearly outline what happened at the location. Below is a selection of this signs around the city.