Your Guess Is as Good as Ours
Visitors annually: Good question
Maybe it's Sundance Square, which 10 million visit. It could be Six Flags over Texas - but they wouldn't tell us their numbers, no matter how nicely we asked. Is it the Dallas Zoo? We don't know, because they wouldn't talk either. There's a lot to see and do in the DFW area, but when it comes to revealing tourist stats, this place is as tight-lipped as a two-year-old staring at a plate of spinach.

USS Arizona Memorial at Pearl Harbor
(808) 422-0561, www.nps.gov/usar
Visitors annually: 1.6 million
This memorial pays tribute to the 1,177 crew members who lost their lives on the "date which will live in infamy." Approximately two quarts of oil still leak from the ship each day, and the droplets are known as black tears.

(714) 781-4565, www.disneyland.com
Visitors annually: 14.7 million
Although the Happiest Place on Earth is known worldwide today, the vision for it was a tough sell at first. "I could never convince the financiers that Disneyland was feasible, because dreams offer too little collateral," Walt Disney said.