• Tagged adventure, cave diving, cavers, caves, caving, ice caves, nature, sea caves

Amazing caves are located all over the globe, different types in a wide variety of sizes are waiting to be explored. Some folks call it caving, spelunking, or even potholing, but it’s all an adventure…at least until something goes wrong and then cavers are called in to rescue spelunkers. It’s been said that “the cave you fear to enter holds the treasure you seek.” While in the mood to go caving, we cruised 500px for creative captures of caves with creative common licenses. Here are the cave photo treasures we found. [35 Photos]

• Tagged outdoor scenes, people, photo contest, photographers, photography, places, travel, Wikimedia Commons Picture of the Year

A decade ago, there were not tons of terrific photos to choose from in the Commons, but photographers have really stepped up by licensing their photos so people can share them along with knowledge. While you may or may not agree with the 12 Wikimedia Commons Picture of the Year winners, most everyone could agree the competition was smoking hot. Categories like animals, plants, people, panoramas, nature, space, architecture and even miscellaneous objects give us a chance to go globe hopping as we celebrate these 45 sizzling snaps. Congratulations winners and thank you to all photographers who make the Commons a fountain of beautiful knowledge! Why don’t you consider uploading your photos to the Commons and maybe we’ll see you listed as a winner next year? [45 Photos]

• Tagged full moon, Harvest Moon, lunar eclipse, NASA, phenomena, space, tetrad, total lunar eclipse

April 15 is tax day in the USA, but don’t let that get you down. Instead, lift your eyes toward the heavens during the darkness and wee hours of the morning to view the first of four total lunar eclipses, spaced six full moons apart. Those four consecutive total lunar eclipses are called a tetrad. Christian Pastor John Hagee dubbed them “Blood Moons” denoting change for Israel; these total eclipses of the moon occur on Jewish holidays such a Passover in April 2014 and April 2015, and Sukkot, or the Feast of Tabernacles, in September 2014 and September 2015. Some folks are even claiming this series of blood-red moons is heralding the end is nigh. You’ve might have seen “blood red” moons before as the term has previously been applied to the coloring of Harvest moons. One thing that’s for sure, if you live in the USA, then you have a front row seat for a tetrad of lunar eclipses. Here’s a calculator to figure when you can see it from where you live. Here are some beautiful photos of blood red moons, aka total lunar eclipses. [20 Photos]

• Tagged ancient trees, coastal redwoods, crepuscular rays, Del Norte, giant redwoods, Grove of Titans, James Irvine Trail, Jedediah Smith Redwoods State Park, Lost Monarch, Muir Woods, Prairie Creek State Park, Redwood National and State Parks, Redwood National Park, redwoods, Stout Grove, trees

Nature is calling, come out and play; explore and have an awe-inspiring adventure among the giant California redwoods. Here among the fog and trees, sunlight peaks through in god-beams, or crepuscular rays. It’s said that tree-loving people travel from all over the world to visit Redwood National and State Parks, which include Redwood National Park, Del Norte Coast, Prairie Creek and Jedediah Smith Redwoods State Parks. They are not the only California parks with impressive redwoods; Muir Woods National Monument is a sight everyone should see at least once. Yet many visitors to Jedediah Smith will never behold the ginormous redwoods known as the Grove of Titans; that’s because their location is a “secret” in order to protect the massive and ancient trees. [40 Photos]