In the northwest portion of Zion National park, in an area known as the Kolob Terraces are fantastic canyons that few visitors see. Just getting to Subway Falls requires about five miles of sometimes walking, wading and making your way up the left fork of North Creek. As you progress, the canyon becomes more and more narrow and interesting. Subway Falls guards the entrance to “The Subway,” an almost round slot canyon that requires swimming and rappelling to negotiate its length. This is a wonderful place where the only sound is water running over sandstone, and sparrows high on the canyon walls.