In honor of RTC’s 30th anniversary, here are 10 game-changers of the rail-trail movement.

Susan B. Anthony, famed suffragette leader and women’s rights reformer, once said of the bicycle, “I think it has done more to emancipate women than anything else in the world. It gives women a feeling of freedom and self-reliance.”

Right now, in the middle of the 21st-century bike boom, the rail-trail movement is the most successful way to build trails for bikers and walkers. But it’s certainly not the first; many other plans for trail building have come and gone.

The Switchback Gravity Railroad, built in 1827, was only the second railroad built in America. It ran nine miles, hauling coal from Summit Hill down to the town of Mauch Chunk and the Lehigh Canal in east central Pennsylvania.