Marianito's Extreme Tex-Mex Grill, San Antonio

Marianito's owners Felix and Judy Ximenez break culinary norms by supersizing classic Tex-Mex fare that has lured in visitors from as far away as Japan and the Middle East. The eatery's signature dish, a 7-pound burrito called the Extreme Grizzly, poses a challenge that, as of 2011, had only seen three victors—finish the behemoth in an hour and it's free. Once done with their meal, eaters can scribble poetic musings or a funny caricature of their enchilada on the restaurant's Hancock-ready wall.