NAKED SLACKLINERS TACKLE NEW CHALLENGES

BALANCING 30 metres above ground, these slackliners take the expression of living dangerously one step further, by tightrope walking NAKED. Crossing a 61 metre stretch, the brave adventurers leave their clothes behind and wear only a single safety rope secured tightly around their waists, ankles, and in some cases - even their private parts. These risqué photographs were taken by Philadelphia photographer Jared Alden, 31, after his love of traveling and adventure merged into his passion for photography. Captured at an unknown slacklining location in the remote Utah dessert, these photographs show thrill seekers getting their kit off for the ultimate slacklining experience at the GGBY highline festival.

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SNOOZING SEAL PUP

RESTING his weary head on his flipper, this little seal pup takes a much needed nap after an afternoon of strenuous yoga .

STUNNING WINTER PHOTOGRAPHS OF THE HIGHEST RAILWAY IN THE ALPS

ROLLING across a 65-metre-high viaduct in the Alps, the red carriages of the Bernina Express add a splash of colour to the spectacular snow-covered Swiss surroundings .

PEEK-A-BOO FISH: BRIT SNAPPER MAKES RARE FIND

A Brit photographer has captured one of the world's most camera-shy species of fish - during a game of underwater peek-a-boo .

ABANDONED PLAZA HOTEL

The beds are consumed by moss instead of customers at this abandoned hotel .

SPRITE LIGHTNING CAPTURED IN AURORA LIGHTS

The aurora lights captured in Blair Nebraska, America - WITH electrifying purple and illuminous green brightening up the night sky, this is the rare moment a flash of 'sprite' lightening was captured on camera .

OWLS ARE MASTERS OF DISGUISE IN INDIAN FOREST

HUDDLED together in the hollow of a tree, it would be easy to overlook these two sleepy owls as they blend into the trunk .

PRISON HOTEL

FOR most people, spending a night locked up in a cell would be undesirable .

BRAVE LEOPARD BEFRIENDS A CROC

A brave leopard kicks back and relaxes in the sunshine - just inches from an enormous crocodile .

CROCODILE CAVE DIVING PENSIONER

THIS DANGER-mad female pensioner could be the oldest Brit to cage dive with CROCODILES .

UNUSUAL FRIENDSHIP

MAKING himself at home, this little snail perches happily on top of this frog's head .

PORTRAITS IN PAKISTAN

A photographer from the United Arab Emirates travelled to Pakistan where he captured the lives of local people in a series of expressive portraits .

BOARDER” COLLIES AND SURF MAD MUTTS HIT THE WAVES

Dogs catch waves at the Coronado Bay dog surf championships Saturday 22nd June 2013- DOG SURFING mutts have never looked so gnarly .