C&O Canal. If you aren't an outdoor person, sorry. But if your'e a runner, biker or walker, you will be in paradise. Miles and miles of trail that's fairly flat the whole way, which is perfect if you're stretching out on a long run, or great if you just want a nice jog. You can watch for turtles, cranes and fish in the canal on one side, and enjoy the incredible view of the river and eclectic houses atop the cliff on the other. The scenery is relaxing and inspiring, and there is plenty of space to share the trail with other outdoor enthusiasts. During the warm months, my ritual is to be here every Sunday morning. Can't start your day a better way.