I have a bit of unusual hobby, climbing stairs twice a week in Los Angeles. I walk for about 5 miles each time, climbing about 1400 stairs. I drive about half an hour to the location, but it is my only way to increase my heart rate to about 160 and I enjoy it. For LA there is a wealth of maps and information in http://bigparadela.tumblr.com/post/117609135946/routes-timet...