The hamburger is the quintessential American food, I think — even more so than apple pie. Although there are plenty of regional styles out there, the burger has become a blank slate upon which culinary artists may express their creativity. Or, they can just get crazy with it, like these three spots.

In Chicago, the top burger place in town comes with a side of metal. Heavy metal rules at Kuma's Corner, where it plays on the stereo and every burger on the menu is named after a metal band. The half-pound burgers range from the conventional (the Mastodon, topped with bacon, cheddar, barbecue sauce and frizzled onions) to the haute (the Lair of the Minotaur, with pancetta, caramelized onions, brie and bourbon-soaked poached pears) to the downright nuts (the Slayer, a platter of chili cheese fries with a burger and andouille sausage under the chili). Make the trek from the W Chicago - Lakeshore and be prepared to wait for a table.

The Lunchbox Laboratory in Seattle embraces the insanity. Its daily experiments, aka, specials, are the draw here — ridiculous mounds of toppings smother the premium ground beef or "dork" (ground duck and pork) patties, all but daring you to try to use the bun to lift it to your mouth. Grab a cab from the W Seattle, and stop at an ATM on the way — these burgers are pricey, but definitely worth it.

It's hard to tell you where to go from the W Los Angeles - Westwood to find Yatta-! Truck, a food truck featuring the All-American, a cheeseburger-like sushi roll filled with beefsteak, pickle and melted cheese, tempura fried. Follow the truck on Twitter to find out where to get this weird wonder.