Russia Moscow to be exact, i h ave been told by many people that come over they like it for the food is real hot and cooked very fresh for turn over
When McDonald's Pushkin Square restaurant opened on January 31, 1990 it broke McDonald's world wide opening day records for customers served. To this day, 12 years later, Pushkin continues to be the busiest McDonald's restaurant in the world.
OUR EXPANDED RESTAURANT OPERATION
McDonald's now operates 103 restaurants in Moscow, Moscow Region, St. Petersburg, Nizhny Novgorod, Yaroslavl, Samara, and Kazan. Not only does McDonald's in Russia serve more than 200,000 customers every day, but, since opening on January 31, 1990, McDonald's has served more than 300 million customers and more than 66 million Big Mac sandwiches.
read more here
http://www.mcdonalds.com/countries/russia.html