Between the villages of Andelsbuch and Egg in the Bregenzerwald, the Brühlbach stream has dug deep into the slate rock. Over ...

National Geographic's enterprising photographers have helped readers explore and learn about our beautiful world through their images for more than a century. Here is their best work from the past ...

Clifftop walkways with sheer drops. Underground crypts lined with human skulls. Roller coasters that will leave you hoarse ...