Sprint Up Skyscrapers and See the World with 'Vertical Marathons'

Lace up your runners and stretch out your hamstrings because though it might be winter outside, we have a good reason to keep up your fitness through the season and throw in some travel as well.

http://www.jaunted.com/story/2013/12/4/63435/4585/travel/Sprint+Up+Skyscrapers+and+See+the+World+with+%27Vertical+Marathons%27