The Philadelphia Experiment is an alleged military experiment that took place in 1943, involving the USS Eldridge, a naval destroyer escort. According to urban legend, the ship was rendered invisible to radar and teleported from Philadelphia to Norfolk, Virginia, and back, resulting in bizarre effects on the crew. The story gained popularity in the 1980s, fueled by claims from individuals like Carl Allen, who asserted to have witnessed the event. However, the U.S. Navy has consistently denied the occurrence of such an experiment, and there is no credible evidence to support the claims surrounding the Philadelphia Experiment.