This harrowing museum dedicated to the urban conflict in Medellín is a must-visit for travelers wanting to fully understand the city (and Colombia). There are interesting displays on the geopolitical origins of the conflict, but the most moving parts are the life-size video screens, where survivors recount their experiences as if they were standing in front of you, and the Wall of Memory outside, which pays homage to local residents killed in the violence, their names etched onto the bricks.