The Montauk Project was alleged to be a series of secret United States government projects conducted at Camp Hero or Montauk Air Force Station on Montauk, Long Island for the purpose of developing psychological warfare techniques and exotic research including time travel.
Due to scant verifiable evidence to support its existence, critics argue the Montauk Experiment is an unverified conspiracy theory or urban legend.
No longer used as a military facility, the Montauk Air Force Station has been open to the public for several years. However, public access to the old military building is prohibited. [ via Wikipedia ]