When the Traveltalks series began in 1930, it was shot in black and white. This is just the third entry to use the Three-strip Technicolor process. It was first used in Holland in Tulip Time (1934).
The white flower shown in the film and called "Zion lilies" by the narrator is actually the datura wrightii, more commonly called the sacred datura. Native Americans use the plant as an anesthetic, narcotic and hallucinogen, and for religious ceremonies and rites of passage.
The Zion Lodge seen in the film was built in 1925 and burned down in 1966. It was quickly replaced and a remodeling in 1990 finally restored it to its original appearance.
It's somewhat curious as to why the American-born James A. FitzPatrick, narrating a travelogue on a classic American National Park, would choose to use the British spelling "colour" in the title.