Why are there giant concrete tunnels in the desert?

Usually in science for a discovery to be considered legitimate, independent verification is needed.  Has this happened in the case of gravitational waves?  Just if the results they're getting are so infinitesimal that detection is a thousandth the width of a proton, that could be due to a mouse farting a couple of meters away from the detector at just the wrong time (it seems to me.)  Okay, being a little facetious there, and that's not overly valid unless there was a mouse who had beans for dinner the other night in the vicinity of the detector in the other part of the country too...  But it's still a question.  Backing up your discovery of a new type of star by saying you saw it with a new type of telescope, but it must be true because the other similar telescope also saw it kinda rings hollow.  If it were picked up by regular telescopes as well, that would be different.  In this case, you said that gravity and light moves at the same speed.  So I suggest pointing a number of telescopes at the point in space where the gravitational wave was detected to come from, as soon as possible, and see what you can see.  Maybe the event that caused the detection was close enough to be visible by telescope?  That would be independent verification I feel.