McLobster is also available in Nova Scotia, so its sounds like an east coast of North America thing.
Rendang burger in Singapore and Malaysia - spicy beef curry filling. Mmmm.
The MegaMac is back on the menu in Tokyo - they stopped for a while because it was taking over the "grill" with its 400 patties per burger. Also, the applie pie here is marketed along with the taro pie.
I love the hot fudge sundaes. In Canada they used to have peanut topping - I haven't been able to get peanuts in Southeast Asia though. Anyone know why?