The Fjaðrá river twists between narrow rock walls, with green slopes and projecting ridges above it. A rim walk reveals the bends gradually, offering a different view of the South Coast landscape from Skógafoss or Reynisfjara.
The walls are mainly palagonite, with water continuing to shape the gorge. Published length estimates differ: the Nature Conservation Agency gives about 1.5 km, while Visit South Iceland gives about 2 km. Neither figure describes the distance you will walk between your chosen parking area and viewpoints.
The best visit is patient but simple: park, follow the signed path, stop at the viewpoints, and resist the urge to chase informal photo angles. The place is memorable precisely because the land is fragile, steep, and narrow.