1. Uluru, Australia
The massive rock - a.k.a. Ayers Rock - is climbed by 250 every day, despite pleas from local indigenous groups to refrain from doing so.
2. Diving with whale sharks
The whale shark is the world's largest fish species and can grow to be longer than 40 feet. This shot was taken off Christmas Island, Australia, in January 2005.
3. Cotopaxi, Ecuador
This volcano just south of Quito reaches an elevation of 5,897m (19,347ft) - often higher than the clouds.
4. Redwood country, California
Taken in Stout Grove, Jedediah Smith Redwoods State Park
5. Sea Kayaking, solo
Big water, small boat. Shot taken walking the Southwest Coast Path from Land's End to Plymouth, England.
6. Great Ocean Road, Australia
The coast along one of the world's most spectacular roads is also good for a walk.
7. Ponoras Cave, Romania
Things can get large underground too. Here, spelunkers from CSA explore "Mammoth Hall" in Romania's Transylvania region. The light trail was produced by a fast-moving caver with a headlamp.
8. Snowfields, Rocky Mountains
This is no photoshop. It's Matador senior editor David Miller getting in some late-season turns in Rocky Mountain National Park.
9. Desert, southern Peru
Sand accumulates into massive dunes in one of the driest deserts on Earth. Notice the city of Ica, Peru, in the distance - also dwarfed.
10. Camping under the stars
So many stars. And camping the best way to let them overwhelm you. This shot was taken near Maupin, Oregon.
11. Mount Bromo, Indonesia
This very active Javanese volcano attracts lots of tiny visitors up to its steaming rim.
12. Yosemite National Park, California
13. Antarctica
Travelers to Antarctica report losing all sense of distance - the geographic scale is so immense and the ice fields so flat and white. This is Lake Fryxell.
14. Preikestolen, Norway
This rock has a great view of Lysefjorden and is a good place to get close to the edge.
15. Mont Blanc, France
Europe's tallest mountain tops out at 4,810m (15,782ft)
16. Salar de Uyuni, Bolivia
This salt plain is the world's largest and traps rainwater during wet winter months, creating a tripped-out sky mirror.
17. On a cliff ascent
This one happens to be the curved limestone face of Malham Cove, North Yorkshire, England.
18. Iguazu Falls, Brazil
The majority of the falls lies in Argentina, but according to the photographer, "the great thing about the Brazilian side of Iguazu is that there are no limits on taking pictures at any time of day….(unlike the Argentinian side)."
