I was driving down us17 outside myrtle beach sc just at sunset when i believe i saw the top of a water tower behind some trees under the clouds but it was huge,at least the size of an aircraft carrier.I did not report this at the time because i have bad eyesight and there is a big airforce base nearby and how could something this big be so close to an airbase without getting a response from someone airplane,helicopter guy n a jeep so i didnt tell anyone until i found out 2 days ago about ufo sightings in myrtle beach on feb 2nd.Anyhow all this thing did was hover,i only saw it for a couple of minutes cause i was on the highway.It was very large,solid white n shaped like,well a water tank that you see in every little town nowadays.My reaction was wow you got to be kidding me but i lost track of the object once i got down the road a bit.Like i said,i blew it off to whatever at the time,but when other people see things a day or two before i saw this i figured i should tell someone so i am.ciao PS i saw no entity so i dont think thats pertinent to what i saw so i put robotic