Las Vegas Strip
(877) 847-4858,
Visitors annually: 38.9 million
The house may always win, but don't be afraid to pull that lever: In Nevada, it's mandatory that video slot machines pay a minimum of 75 percent on average. Plus, what happens in Vegas … well, you know the rest.

Tate Modern
Visitors annually: 4.9 million
Although it's been open for less than a decade, Tate Modern is already a powerhouse tourist attraction in London. To accommodate the unexpected crowds, the museum has plans to construct an extension that will expand its size by 60 percent.

Miami Beach
(305) 604-2489,
Visitors annually: 10 million
Known as a hot spot for the young, rich, and famous, Miami Beach is a prime place to peoplewatch. Fashion shoots and the filming of movie scenes are common here, so you never know who might saunter by as you're sitting in the sun.