Locations > Texas > Alvin Alvin, Texas UFO Sightings Alvin, Texas, Triangular Object UFO Sighting - Couple of days ago over Walmart at night triangle shape on bottom one red light or side green.... 05/03-2020 Alvin, Texas, Lights UFO Sighting - This happened in 2016 in Alvin, TX. Behind the YMCA there is a park with a small man-made pond. I would take my younger daughters out at night to fish... 10/20-2018 - 1 comment       Submit a UFO sighting for Alvin, Texas: When did this happen (optional):