Going Green in America's Cities

Where to stay: The historic Willard (202/628-9100; washington.intercontinental.com) recently made a switch to using 100% wind-power energy. Although the energy comes as carbon credits, it does reduce the amount of greenhouse-causing CO2.

Where to eat: Poste Brasserie (202/783-6060; postebrasserie.com) uses its aquahealth water system to eliminate plastic bottle use. Guests enjoy fresh sparking or still water without the waste.

How to travel: Hop into an electric roadster and take in the sites with the Bi-Partisan Tour Company (202/558-6848; bi-partisantourcompany.com).

Green activity: The country's first LEED-CI spa, Nusta Spa (202/530-5700; nustaspa.com), offers eco-friendly products and treatments like spa fusions and stone facials in a healthy space.