I've got a thing for cheeseburgers and one of my favorites so far is the "Classic Byways Burger" at the Byways Cafe in Portland, Oregon.
This burger is not for those in possession of a petit appetite. It's a 1/3 lb. patty made from Painted Hills organic ground beef served up with lettuce, tomato, onion and your choice of cheese.
They're only open for breakfast and lunch so don't dally.