European coach operator FlixBus has revived the notorious '666' bus service to Hel, a seaside resort on a narrow peninsula jutting into the Gulf of Gdańsk in northern Poland. The route was originally renumbered to 669 in 2023 after religious conservative groups pressured its previous operator, PKS Gdynia, over the combination of 666 — the biblical 'number of the beast' — and a destination name one letter short of 'hell'. FlixBus says the number was deliberately chosen as a marketing move, and the new 13-hour service will link the southern city of Kraków to Hel via Warsaw, framing the controversy as an asset rather than a liability.