1. Glen Canyon, near Page, Arizona, US Within Glen Canyon National Park, which is over 1.2 million acres area-wise, Horseshoe Bend is a spot along the Colorado River where the river bends so sharply, it almost completes a circle. Image by Eddie 11uisma 2. Sumidero Canyon, Chiapas, Mexico In some places, Sumideros vertical canyon walls reach 1,000 meters. The Sumidero Canyon National Park gets 300,000 visitors every year for waterfall sightseeing, hiking, swimming, fishing, mountain biking, and spelunking. Image by Igor Pardini 3. Coyote Buttes, between Kanab, Utah and Page, Arizona, US The Wave in the Coyote Buttes North Area of Paria Canyon-Vermilion Cliffs Wilderness Area is a section of multicolored carved sandstone that looks like it was taken out of a page of Dr. Seusss Oh the Places Youll Go. Image by Gabe Farnsworth 4. Kali Gandaki Gorge, Nepal Because all canyons and gorges are different, from the slope of their walls and their rim height above sea level, its difficult to determine a list of the deepest canyons in the world. Kali Gandaki Gorge, in the Himalayas, is proclaimed as such, if the depth is the measured by highest peak of the mountains on either side minus the elevation of the river a depth of over 19,000 feet. Image by Andrew Castellano 5. Bryce Canyon, Utah, US Bryce Canyons iconic landscape is composed of pillars of sedimentary rock called hoodoos. Bryce has the highest concentration of hoodoos in the world. The is also a really good for stargazing, with a 7.4 magnitude night sky, meaning the sky is so clear, you can see on average 7,500 stars. (For comparison, LA and New York have 2 magnitude night sky ratings). Image by Dan Sorensen 6. Cheile Turzil, near Turda, Romania This canyon is 2,900 meters long, in some points 300 meters high, and is home to over 1,000 species. Cheile Turzil is one of the most popular spots for climbing in Romania. Image by Sergiu Bacioiu 7. Colca Canyon, near Arequipa, Peru The Colca Canyon is more than twice as deep as the Grand Canyon, at a depth of 13,650 feet. Image by Kim Schandorff 8. Blyde River Canyon, Mpumalanga, South Africa Blyde River Canyon is 16 miles long and 2,500 feet deep, the second largest canyon in Africa. Image by Irene 9. Palo Duro Canyon, near Amarillo, Texas, US The second largest canyon in the United States, the Grand Canyon of Texas is 120 miles long with depths up to 997 feet. Georgia OKeefe often visited and painted the canyon when she taught at West Texas State Normal College. Image by R Hensley 10. Fish River Canyon, southern Namibia At 100 miles long and up to 1,800 feet deep, Fish River Canyon is the largest canyon in Africa and the second largest in the world. Its a popular tourist attraction in Namibia check the 53-mile Fish River Hiking Trail, which takes 3-5 days to hike. Image by Stefan Magdalinski 11. Waimea Canyon, Kauaʻi, Hawaii, US Waimea Canyon is 10 miles long and 3,000 feet deep, formed initially by a volcanic collapse and then by erosion. Waimea means reddish water in Hawaiian, for the color of the canyons soil. Image by Dale LaFollette 12. Barranca del Cobre (Copper Canyon), Chihuahua, Mexico Copper Canyon is actually six canyons formed by six different rivers that eventually empty into the Sea of Cortez. Parts of the canyon are inhabited by the Huichol people, who travel once a year over 300 miles out of the canyon to the peyote fields in San Luis Potosí in an arduous peyote pilgrimage. The total area covered is 25,096 square miles, with depths of over 6,000 feet. Image by Matt Mawson 13. Santa Elena Canyon, Big Bend National Park, Texas, US Santa Elena Canyon is one of the most popular spots in Big Bend National Park you can hike above the Rio Grande and/or paddle the river. There are 31 known species of snakes in the park, so youll probably never see me hiking there. Image by longhorndave 14. Fjaðrárgljúfur, Südosten, Iceland At 328 feet deep and just over 1 mile long, Fjaðrárgljúfur isnt a huge canyon, but theres a hiking trail along one rim that leads down to the base. The nearest landmark to the canyon is Heiðarsel, a deserted farm. Image by Johan Wieland 15. The Grand Canyon, Grand Canyon National Park, Arizona, US The Grand Canyon runs 277 miles long, up to 6,000 feet deep, and 18 miles wide. Its the largest (longest) canyon in the world. Theodore Roosevelt established the Grand Canyon Game Preserve in November 1906, and it became a national park in 1919. Image by B Rosen 16. Yarlung Zangbo Grand Canyon, Tibet The Yarlung Zangbo Grand Canyon is also considered by some the deepest in the world. Its most extreme depth is 19,714 feet. Hydropower lobby groups whod like to harness the power of the Yarlung Zangbo River were disappointed this year when the Chinese government earmarked money to develop the area for tourism. Image by Bob Jiang 17. Antelope Canyon, Page, Arizona, US Antelope Canyon is on Navajo Land near Page, Arizona. It can only be visited with a permit and a guide from the Navajo Nation. Its one of the most photographed slot canyons in the US. Image by James Neeley 18. Eldgja (Fire Gorge), near Landmannalaugar, Iceland Eldja is called Fire Gorge because its a volcanic canyon. At 270 meters deep and 600 wide, its the largest such canyon in the world. Image by Martin Ystenes 19. Zion Canyon, Utah Zion is home to the worlds largest arch: Kolob Arch, with a span of 310 feet. Wildlife you can see there includes golden eagles, mule deer, and mountain lions. Image by ingridtaylar 20. Itaimbezinho, Rio Grande do Sul, Brazil Located in Aparados da Serra National Park, Itaimbezinho is 5.8 kilometers long and up to 2 kilometers wide and 700 meters deep. In the Tupi-Guarani language, ita means stone and aimbe means cut. Image by Richard Adler Cheles 21. Buckskin Gulch, Utah, US Also located in the Paria Canyon-Vermilion Cliffs Wilderness Area, Buckskin Gulch is the deepest slot canyon (narrow canyon) in the Southwest US. Permits are required for day hiking and backpacking overnight. Because only 20 overnight permits are issued each day, theyre often booked months in advance. Image by John Kupersmith 22. Charyn Canyon, Kazakhstan Close to the Chinese border, Charyn Canyon reaches depths of up to 300 meters. Like many of the canyons on this list, its inside a national park. Charyn National Park is one of the newest, created in 2004. Image by Vladimir L 23. Gorge du Verdon, France 25 kilometers long and 700 meters at its deepest, the Gorge du Verdon is named for the turquoise river that runs through it. Tourists from the nearby French Riviera can kayak, hike, or rock climb some of Verdons multi-pitch routes. Image by Flemming Søgaard 24. Nine Mile Canyon, eastern Utah, US Nine Mile Canyon is actually 40 miles long its named for a creek that runs through it. The canyon has over 1,000 rock art sites containing 10,000 images. In more recent history, fur trappers, ranchers, and now natural gas developers have occupied the land in Nine Mile Canyon. Image by Richard Adler Cheles 25. Canyon De Chelly, Arizona This canyon has been inhabited for around 5,000 years and is the longest uninterrupted stretch on the Colorado Plateau. It became a National Monument in 1931 and sits within the boundaries of the Navajo Nation. Image by katsrcool 26. Mides Canyon, Tunisia Mides Canyon might look familiar if youve recently seen The English Patient (they filmed the desert scenes there). The Tunisian canyon system covers over 5,000 square kilometers. Image by Chris Murphy 27. Dadès Gorge, Morocco Located between the Atlas Mountains and Anti-Atlas range, the gorge valley is home to many Berber villages. The Berbers an indigenous ethnic group of North Africa originally settled the area for defensive reasons.