The Subway, Angels Landing.
The Subway requires permits throughout the year and is frequently at high risk for flash flooding. That said, it’s one of the truly remote and quiet areas of the park. Angel’s Landing is one of the most popular hikes inside of Zion Canyon, and you should expect heavy traffic, particularly in the middle of the day. If lines, crowds and/or heights make you uncomfortable, be warned that all three exist in heavy combination on the chained path to Angel’s Landing.