Anthropologie is located along M street, along with a lot of other shops and restaurants near Georgetown University. It is fairly large with 2 floors, selling fun and earthly looking women's clothing. The styles are unique and very trendy, but may not be appealing to all. The clothes tend to be pricey, but with their sales, you're able to find a good deal.
The store also carries some home furnishings, sleep wear, and clothing accessories. One thing to be noted is the dressing room. It's large, got comfy chairs, and is quite unique. They actually write your name on the outside of your dressing room.
Parking will be limited, so either take the Circulator, walk from Foggy Bottom, or be prepared to pay for parking. There's always tons of cars and people in this area, so watch out for traffic.