View from above the canyon.
Walking along the creek.
Left Fork of North Creek, Zion National Park.
Cairns mark the route to Lower Subway.
Canyon tree frog (Hyla arenicolor).
Black swallowtail butterfly (Papilio polyxenes).
Left Fork of North Creek, Zion National Park.
Left Fork of North Creek, Zion National Park.
The concave walls begin to resemble subway tubes.
The Subway, Zion National Park.
Left Fork of North Creek, Zion National Park.
A full subway tunnel effect. This is as far as you can go without gear.