Explore cutting-edge techniques for autonomous navigation in urban environments without relying on traditional maps. Delve into reinforcement learning concepts, including value functions and Q-value functions, as applied to city navigation. Examine the courier task problem, analyze various actions and environments, and understand the architecture of a City Navigation Agent. Learn about training methodologies, the actor-critic approach, and multi-site experiments. Gain insights into abolition analysis and goal description techniques for improving navigation performance in complex urban settings.