Tried a Northern Lights Tour in Iceland recently, a scam at best and more likely fraud. We are not upset because no lights showed, but by Viator and Greylines sleazy tactics. We got on NOAA's website to check probability of seeing lights at our location, 1% according to NOAA! Rainy and overcast locally. We checked assuming the operators would cancel but no we are going. We thought ok they're the experts. On the one hour ride out of the city our guide said to never trust the websites that predict northern lights. I guess the vendors guide knows more about the weather and solar activity than the people that study this everyday and have Phd's in those topics. Anyway us and 12 other full size tour buses, with by our count averaged 50 bodies each, plus 3 or 4 smaller buses arrive at our supposed premium viewing site. We could not believe it, they dumped around 600 people off within a hundred yards of a working light house. The outbuildings were brightly lite with yard lights,and there was a residential neighborhood less than a 1000 feet from the lighthouse's parking lot we were in! This was after our guide had told us on the way out that avoiding light pollution was one of the key elements to successful viewing and we and 600 other poor sapps are parked under a god-damned working lighthouse!! Absolutely incredible!! Now to the good part, since the excursion went out, regardless that it didn't make since to go, the policy is that you can book another trip within 2 years if you didn't see any lights, no refunds since the tour operator decided to go. How many of those tourists that are only on Iceland for a short visit plan on coming back within 2 years to collect on their re-booking "guarantee"? Damn few, and Viator and Greyline know it. I'll quit ranting but be warned, Viator and Greyline are nothing more than cons and scammers. We will tell anyone who will listen, no matter where they travel, to never use these crooks!