On November 17th, 1998, at approximately 5:30 PM Greek time, I and my mother witnessed a remarkable UFO sighting while driving through the Ermioni region in the Peloponnese, Greece. The exact location is 37,50233° N, 23,19204° E. As we made our way back to Athens, we spotted a massive, dome-topped UFO hovering silently in the sky. The object, estimated to be around 10 meters in diameter, was enveloped in a radiant white glow emanating from its rim. This unidentified craft remained stationary for nearly 40 seconds, seemingly having a clear view of our car as we had for it as well. Then, without warning, it began to ascend slowly, before abruptly accelerating upwards at an astonishing speed that surpassed the speed of sound. Unlike typical aircraft, its rapid ascent produced no visible sonic boom. Its movements were deliberate and controlled, as if it had paused to allow us a clear view. We continued our journey towards Athens without altering our route, maintaining a cautious pace as we processed this extraordinary experience. The altitude of the UFO during its initial hovering was estimated to be around 3,000-5,000 feet. It was not a mere inexplicable light in the sky; it was an unequivocal sighting of a structured craft. Throughout this encounter, we felt no sense of immediate threat from the UFO. Despite the significance of this event, we remained silent about it for the following two decades. Only now, after 26 years, have we decided to share our profound experience. We have no doubt whatsoever that we witnessed a non-terrestrial craft, propelled by technology far beyond our current understanding. Our encounter with the Ermioni UFO remains firmly etched in our memories, a testament to the vast and enigmatic mysteries that continue to unfold beyond our earthly realm.