As part of their training, Marines at Quantico are placed in situations that closely resemble real war, particularly the military theater in Afghanistan.
VOA: standard.2010.04.06
Indeed, their way of life is thought by many anthropologists to resemble quite closely that of pre-agricultural people throughout the world.
And though landmarks such as the central market clock tower may help you orientate yourself somewhat, chances are a map of your exact wanderings after a day out at Chatuchak would resemble most closely a plate of pad thai noodles.