source:clickhereUnderground you can still be the first person on Earth to take the small step, or the giant leap. This Tennessee cavern, christened Indianapolis by its premiere explorer, was only discovered

source:clickhereThis male lion rests in the soft grass on a gloomy day in South Africa.

source:clickhereWhile taking photos of Santa Maria reef near Cabo San Lucas, Mexico, I noticed this deep-diving bird chasing a massive school of baitfish in the middle of the reef. It was fast, but I was

source:clickhereIn Port Lockroy, Antarctica, two newly hatched gentoo penguin chicks get a quick look at the outside world as one of their parents stands up on the nest for a moment.

source:clickhereVeiled in haze, twin peaks of Angola’s Chela range tower above a Kuvale herdsman in a picture published in September 1961, the same year conflict erupted in what was then a Portuguese colony.

source:clickhereSunrise from the Bastei. It was the first sunny day in our country this year. The Bastei is a rock in our sandstone mountains in Saxony, Germany.

source:clickhereThis is a photo of a "family" of pink anemonefish in and around their host anemone. If you look closely you can also see the small anemone shrimp (tiny white eyes) in and around

source:clickhereOryx captured in Namib-Naukluft National Park in Namibia just after sunset. They are heading through the dunes in search of food and water.

source:clickhereDaniel Buren’s work, "Excentrique(s)," fills the Grand Palais in Paris, an absolutely beautiful work of art in its own right.

source:clickhereKocatepe Mosque, one of the largest in the world (holding up to 24,000 worshippers), is a modern building completed in 1987. I had been given permission to wander around and take photos

source:clickhereSafely bedded down, a brown bear takes a nap after fishing in the Katmai National Park and Preserve of southern Alaska.

surce:clickhereSherpa Nima Dorje Tamang traverses a ladder on the Khumbu Icefall of Mount Everest in Nepal. "Universally terrifying, it is the most dangerous part of the southern route on Everest.

source:clickhereThe electric blush of Salt Lake City, more than a hundred miles (160 kilometers) away, brushes the horizon over Utah's Bonneville Salt Flats.

source:clickhereSome green roofs can be far simpler to create than traditional roof gardens. Volunteers from Cook + Fox installed the New York City architectural firm's roof themselves using Green Paks.

source:clickhere"We're farm people," says Janice Haney of Greensburg, Kansas. "I enjoy hanging clothes out. We don't have to waste electricity on the dryer. The good old Kansas wind can

source:clickhereThe locals say palm trees here grow legs and walk to find more sunlight. Standing on stilts, Madidi's "walking" trees, at right, appear to move as their shadyside roots wither.

source:clickhereIn a far north without ice, a mother bear could be stranded a long way from good hunting, struggling to feed herself and her cubs. This snow-free scene near Kapp Fanshawe (Cape Fanshawe)

source:clickhereWhile at Huntington Beach in Bay Village, Ohio, I saw a storm approaching fast out of the north. I got lucky and was in the right place at the right time. Within a minute of this shot,

source:clickhereMorning draws a moose cow and calf into the shallows of Mayfield Lake in British Columbia. With a rich array of species, including several types of large mammals, the M-K offers a unique

source:clickhereChicago at night burns bright under blankets of clouds. Much of the glow escapes from streetlamps, including clear, Victorian-style lamps good for creating atmosphere but poor for harnessing