To actually be serious about this topic, yes there are alien bases on this planet. If you study the history of alien contact with this planet, you will discover that many different times, in many different places, alien craft has been seen decending into lakes and underwater caves. These craft are later seen departing from these same lakes and caves. It would of course make perfect sense. If you believe that aliens are indeed visiting this planet, then they would definately need a rest and repair shop somewhere on this planet. Sometimes their craft becomes damaged and needs repair, so they need to have permanent bases here on earth. Many believe that there are huge underground complexes in Dulce, New Mexico, that where built by both Humans and Aliens to asist in the transfer of technology