Do you know why you never miss the road that leads to your girlfriend's house? Give credit to your brain's mental compass. The brain has a complex system for keeping track of which direction you are facing as you move about say researchers adding that people use geometrical relationships to orient themselves. To test how the brain makes these inferences the researchers designed an experiment in which they introduced participants to a virtual environment - a set of four museums in a park. They asked the participants to memorise the location of the everyday objects on display in those museums.