Canyon Passage – Trending

: They can vary from narrow "keyhole" slots to massive galleries over 100 feet high.

: Because of their vertical nature, they often require "chimneying" (bracing against opposite walls) to traverse. Canyon Passage

: The film was praised for its location shooting in Oregon, which provided a more realistic and verdant backdrop than the dry desert landscapes typical of Westerns at the time. 2. Speleology: Canyon Passages : They can vary from narrow "keyhole" slots