"The U.S. Capitol Building is the epicenter of all D.C. political action—this is where the country's most important battles are fought. Home to the House of Representatives and the Senate's meeting chambers for more than two centuries, it's also an art gallery in its own right, with priceless paintings and murals adorning the walls and ceilings. Take the free guided tour and marvel at the parade of political heroes and villains who have roamed its halls during pivotal moments in U.S. history. The Capitol is located within easy walking distance of the Library of Congress, the Supreme Court, and the U.S. Botanic Garden."