Watching ants go about their work is really fascinating. There usually is a line of workers going toward some food source and a separate line returning to the colony. However, the most fascinating aspect is how workers discover and communicate their discovery.
Each day worker ants leave the colony in search of food. They move randomly through their environment until discovering a food source. Once obtained they return to the colony with the food and mark the path with a pheromone. Here other workers find the trail and follow it to the food, leaving more pheromone, making the location easier to find.