In this episode of Mysteries of UFOs, we dive into the Hudson Valley UFO wave, a massive series of sightings that stretched from 1983 to 1986 in suburban New York. Thousands of residents—families, police officers, pilots, and commuters—reported seeing a huge, silent triangular or V-shaped craft hovering low over towns, highways, and forests. Witnesses described bright white lights along its edges and a red light at the center, with many insisting the object was the size of a football field or larger.

Calls flooded police departments as people watched the craft glide slowly, sometimes appearing to drift deliberately over neighborhoods or stop in midair. Traffic jams formed on highways as drivers pulled over to stare upward in shock. Despite theories that ultralight aircraft flying in formation caused the sightings, that explanation failed to match the sheer size, silence, and precision of the object witnesses described—and many sightings occurred in conditions ultralights could never survive.

After three years, the mysterious craft vanished just as abruptly as it arrived. The Hudson Valley Lights remain one of the largest and most credible mass UFO sightings in U.S. history, with thousands of consistent eyewitness accounts and no official explanation.