The concept here is that a road, Dokebi road on Jeju Island, looks like it's sloping uphill when it's actually sloping downhill. Wow. In the hope that an explanation will not spoil too much, the secret lies in the fact that there is no true horizon in the landscape surrounding it, which creates the illusion of the wrong slope direction. But the main attraction is really not the road: it's the Korean tourists arriving with levels and water bottles to prove the slope direction. Give it a try.