Imagine the anatomy of a classic American hamburger: sesame bun, tomatoes, lettuce, sliced cheese, condiments, and a perfectly grill-marked beef patty. Simple, easy to assemble, and almost impossible to go wrong. Since it was introduced to North America nearly a century ago, the burger is now everywhere -- bars, restaurant chains, diners, and even pizza joints. This beloved fast food staple enjoys endless variations the world over, from Denmark to Serbia and Cuba to Bora Bora.
To celebrate National Hamburger Day on May 28, we let the grill do the talking and take a look at how different countries make their burgers. Here are the 10 best burgers from around the world: