Why are burgers meant to fit in one hand? So that you can hold two of them at once. Burger Fest challenges you to do more than just double up. Over 15 Athenian burger houses participate in this year’s festival celebrating all things between buns at the Old Train Depot in Keramikos. Athens is known for its buzzing gourmet burger scene and at Burger Fest you’ll find yourself at the sizzling heart of it all.