- Investigate Blinkenlights (mentioned in the Hacker News thread).
- Great American Rail-Trail (railstotrails.org)
The Great American Rail-Trail® is the nation’s first cross-country multiuse trail, stretching more than 3,700 miles between Washington, D.C., and Washington State. This trail is an iconic piece of American infrastructure that will connect thousands of miles of rail-trails and other multiuse trails, serving tens of millions of people living along the route as well as those who visit the trail from around the country and the world.