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 ...

25.3 48.3 (23.0) - CH / 800 m / tf / 2 bt 4 / T C Guta / Slow canter site (R.B.) (CH) ...

24.6 47.0 (22.4) - ST / 800 m / tf / 10 bt 11 / C L Chau / Swimming ...