According to the National UFO Reporting Center’s International UFO Report Index, there have been 11 reports of a UFO in Conshohocken since 1948.
The latest report from 2019 claims that there was a triangle-shaped object with lights that changed color. The unnamed person who reported this also stated that there were aircraft in the vicinity with the possibility that they were chasing the object. It goes on to say that animals reacted to the event.
While almost all of the reports involve lights in the sky, a sighting from 2008 claimed that the UFO landed. A report from 1971 has the most detail about what the UFO looked like.
You can search all of the reports here.