There are places you grow up assuming you simply have to see. Then you finally arrive and discover a crowd, a souvenir shop, a long line, and something that looked considerably more impressive on television. Some of North America's biggest attractions have earned surprisingly brutal reviews from travelers who found them overpriced, overcrowded, or simply underwhelming. That doesn't mean you should never go, but plenty of visitors leave thinking, “Well, I never need to do that again.”