Niagara Falls, U.S. And Canada
Most Popular: Natural wonder
What it's Got: Water, and a lot of it. Over 700,000 gallons of water plunge over the falls each second. Visitors can see the different individual falls from lookouts on the Canadian and U.S. sides, or get a different view with helicopter or boat tours.
Why You Should Go: The thunderous falls are impressive in a way that can't be captured on film. And a concerted effort on both sides of the border to class things up a bit has yielded options for visitors looking for more than a motel and a burger.
Why You Shouldn't Go: There's no disputing the majesty of the falls, but unless your kitsch tolerance is high, the tacky souvenir shops and tourist attractions close to the action can get old fast.