H. Flowe Trexler Region 3 Discovery Center Blackville, SC | Category: Other Attractions By journeying through a train car simulation, strolling along railroad tracks and exploring the past in replicas of Best Friend train cars, visitors of the Region 3 Discovery Center will experience the history of the people, land and culture of this "Rivers, Rails and Crossroads" H. Flowe Trexler Region 3 Discovery Center