It's easy to spot Aria Trattoria at Ronald Reagan Building and International Trade Center. What's more, once you're in, the buzz of hungry diners and titillating aromas is very appealing. Pizzas, pastas and sides are delicately and cleverly prepared for the buffet antipasti. And even if you're stuffed, don't skip the gratifying sorbets and gelato. The wine list with Spumante, Bianco and Rosso is pretty impressive. Aria also has outdoor seating, should you decide to dine alfresco.