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Desert View South Rim - Grand Canyon National Park, CA
Desert View South Rim - Grand Canyon National Park, CASubmitted by Aaron Keigher / UGC

Dec. 18

The correct answer is: The Colorado River.

Originally named Rio Colorado or “Red River”, the 1,450-mile-long Colorado River runs southwestward from Rocky Mountain National Park in Colorado, to the Gulf of California in Mexico.

Msnbc.com thanks our readers for participating in It’s A Snap! We look forward to another year of your stunning photos!

Happy holidays!

All year long, you’ve been voting for your favorite travel photos sent in by msnbc.com readers. Here is a collection of the year’s very best.