Joe Puccio:

WalkNYC checks off each block as you walk it on an interactive map across all five boroughs. Set goals by borough, watch your coverage grow, and see how you stack up against other New Yorkers on the leaderboard.

This is such a neat idea. If I had come across this app prior to today I have a feeling I would be doing quite well on the leaderboard. Last year I walked just over 2,600 miles 😮‍💨