A five-day trek to Point Lenana in Mt. Kenya National Park can be done with or without porters and tour guides but without a map, an array of gadgets or even the sun and the moon, one can surely get lost. 
According to a research scientist, Jan Souman, at the Max Planck Institute for Biological Cybernetics, people do walk in circles and have a tendency to get lost without the proper training and equipment. The scientist and his team sent test subjects out in a German forest and the Sahara desert to find out if they could walk in a straight line. One group were set out on sunny days and another group on cloudy days and at night. The groups were observed via GPS over the course of hours. Those walking under the sun kept a relatively straight course but once the sun was out, they began to walk aimlessly even though they believed they maintained their pace.
