Rock Creek Taxicab Co

The Smithsonian National Museum of Natural History boasts the world's largest natural history collection that will inspire several "oohs' and "aahs" from visitors of all ages. Among the highly dramatic and memorable exhibits are a 70 million-year-old dinosaur egg, an incredible giant squid, and a look at a truly unforgettable tarantula feeding that will inspire several gasps among all who view it. In addition to all of these exhibits, the museum offers even more adventures via the 3-D IMAX theater within its facility.

Capitol Coin and Stamp is a haven for both history buffs and political memorabilia collectors. The shop features a far-reaching array of items that include everything from bumper stickers, election pins, T-shirts and political posters that literally span the entire century of political activity. There are even some items that date back to Abraham Lincoln's Presidential campaign! So, there's no excuse for not leaving Washington without some type of political souvenir from this interesting shop.

One of the city's most stunning attractions is the Washington National Cathedral that began construction in 1907 and was not completed until 1990. Theodore Roosevelt was just one of the Presidents who oversaw the cathedral's construction, and every US President has attended services there. The structure is approximately one-tenth of a mile long and it contains more than 200 stained-glass windows that create a mesmerizing effect when the sun shines through. The observation gallery within the cathedral offers still more unbelievable vantage points, and there are regular tours that explain the architecture, history and the church's mission in further detail.