The Subway is a mysterious keyhole slot in the west fork of the NorthCreek in Zion National Park.

"Subway" Zion National Park, UT By Robert Park http://www.robert-park.com, a photo by Robert Park Photography on Flickr.

The Subway is a mysterious keyhole slot in the west fork of the North Creek in Zion National Park.
It is a very strenuous and slippery nine mile round trip that few people ever get to see.
The pools get their color from the algae that thrive in the cold water that never sees sunlight
For most of the year.
Location The Subway, Zion National Park, UT. © Robert Park www.robert-park.com