Ronald Reagan Building and International Trade Center
At more than 3 million square feet, this is the largest federal building in Washington and the only property dedicated to government and private entities. A blend of classical and modern architecture, the center welcomes over a million visitors annually and is officially the World Trade Center, Washington, D.C. The Ronald Reagan Building, which hosts special events throughout the year, is home to a permanent art collection—one that includes a section of the Berlin Wall—and the Woodrow Wilson Presidential Memorial Exhibit and Learning Center. It's also a popular place to get married, thanks to its fantastic views over the city. If you're hungry, pick up something from one of the 17 eateries in the spacious food court on the concourse level. In summer, check out Live!, a free concert series, performed daily (weekdays) from noon to 1:30. A farmers' market takes over the plaza on Friday from 11 pm to 3 pm from spring to fall.