They're helping give railroads a second life.
Along the Missouri River, there are 26 rambling trails where you can walk or bike through soft marshlands, towering bluffs, pleasing pastures, and thick forests.
Those trails make up the Katy Trail State Park — the longest public area in the United States that was formerly train tracks.
Built on the corridor of the Missouri-Kansas-Texas Railroad, there's also quite a bit of history to be found on any outdoor excursion in this state park. Most trails go past restored historic depots and former railroad towns. It's no surprise all 240 miles of this park were added to Rails-to-Trails Conservancy Hall of Fame in 2008.