Colossal angular vessel gliding at low alt. over Olympic Peninsula, WAOn the eve of Aug. 14th, 2012 approx 11:15 pm., my husband called my name from the front porch.I ran to his side to find him and my three children staring in awe at what appeared to be an aircraft of colossal size. The night sky was crystal clear and littered with stars, yet the lights of the craft were distinctive. Five lights were visible at first sight, as the craft traveled North-South at a rate of speed and likeness of motion I can only compare to that of a blimp. The distance between our vantage point and the object appeared to be very approximately 500-800 feet. No “engine noise” was present, instead a fluxuating, “whirring”, or “humming” noise seemed to float down from it as it traveled at a very constant elevation (also unusually low for ANY aircraft, seemingly mere hundreds of feet above our treeline).Approx. 1min after the initial sighting, it began to turn, rotate rather, as if on a central axis. It then began to travel from West-East, at the same rate, & elev. After traveling another short distance, ( for approx. 1.5 min, ) It appeared to come to a complete stop, hovering in mid-air, as it again rotated on axis 90^. Now heading due North, (the direction from which it had originally come), it proceeded on its way headed almost directly towards Protection Island, ( +/- 1.5 miles NW of mouth of Discovery Bay).I can distinctly remember being able to hear the wavering hum it emitted for a minute or two after it disappeared from view.