Despite unthinkable temperatures, these uninhabited frontiers lure photographers, wildlife buffs and adventurers alike.
Some railway lines are so steep they require rack rails - toothed racks that the rails lock into using a cog or pinion.
What is this place? What is this city like? What makes its people tick? And now I've gained a tiny window into its citizens' lives.
Ahead of us, the summit of Monte Rosa rises above cloud, with a large glacier scraping down its slopes and into the valley three vertical kilometres below.
Exactly how much sleep can you get knowing there is nothing but a sheet of canvas separating you from some of the world's most dangerous animals?
I close my eyes and feel the breeze ... soon, I even manage to peep over the windowless door to check out the land below.
You needn't hike for days to find some of the state's finest scenes.
A Canadian summer yields magic with a scenic ride around the rim of spectacular Myra Canyon, doable for even an average cyclist.
Colombia has cleaned up its act and moved on in the last 25 years.
From suspended spheres to a treetop teahouse to a bird's nest on a branch.
From peaks of Patagonia to the red deserts of Australia, here are the top places for an adventure in the outdoors (and you don’t need to be a nature lover to do it).
Iran has been largely overlooked by tourists but now its dazzling ancient treasures and physical beauty is attracting a record number of visitors.