If the navy launched submarine sandwiches instead of submarines, their bready exteriors would get soggy and sailors would be covered in more olive oil than normal. Devour an edible ocean vessel with today's Groupon: for $5, you get $10 worth of sandwiches and more at Subway's Berwyn and West Norriton locations.

Ranked the number one submarine sandwich franchise in the 2011 Franchise 500 issue of Entrepreneur magazine, Subway has graced the globe with nutritious stacks of meat, crisp veggies, flavorful cheeses, and freshly baked breads since 1965. Sandwiches, including the classic big philly cheesesteak ($5.50 for a 6"), can be left out in the cold or invited into a toaster, and the $5 foot-long subs are useful for measuring a child's height in cold-cut combos or the distance between the earth and the sun in meatball marinara. There are also kids' meals to introduce children to the concept of eating. This eatery also opens for bountiful breakfast sandwiches served alongside cups of Seattle’s Best Coffee ($1.47–$1.59 for a 16-oz.).