For many Americans, Memorial Day weekend will be one of backyard picnics and beach side barbecues. But for the adrenaline junkies out there, the long weekend is the kick off to amusement park season, and a great excuse to trek out to their favorite parks.

We've taken a look at the world's scariest roller coasters, as well as the funniest snapshots taken by the souvenir photo camera. Here, Travel Channel's Bert Kreischer, of "Bert the Conqueror," shares picks for the top five coasters in the U.S.

Have you conquered these coasters? Leave your thoughts in the comments below!

Photo: daveynin/Flickr