If you're hungry, head to the South Street Diner to appease your appetite. No matter what time of day or night, this eatery stays open 24 hours a day, 7 days a week, so it's perfect for late in the day breakfasts or that necessary fourth meal after a night at the bar. This diner has been a part of city culture since 1947 and it's definitely a Boston destination that you have to experience.