Jerry, you're missing out on a great city. Just as well, we don't like scared tourists anyways, talking amongst themselves in very loud, nervous tones in the Metro. Luckily, most tourists seem to prefer to swelter in long lines to climb up tall monuments, go figure. They're missing the fun stuff.

DC and the surrounding cities and counties in Virginia and Maryland have a fantastic network of bike paths, not to mention the very good DC street network that is easy to navigate once you know the system (alphabetical and numerical in quadrants, quite simple). Pick up an ADC bike map at any LBS and go exploring.