Beyond the standard hiking and biking activities, there are plenty of other opportunities to enjoy Philadelphia [1].
Links:
[1] http://www.moon.com/destinations/philadelphia/discover-philadelphia
[2] http://www.moon.com/destinations/philadelphia/arts-and-leisure/recreation/other-recreation/bowling
[3] http://www.moon.com/destinations/philadelphia/arts-and-leisure/recreation/other-recreation/fitness-centers
[4] http://www.moon.com/destinations/philadelphia/arts-and-leisure/recreation/other-recreation/frisbee
[5] http://www.moon.com/destinations/philadelphia/arts-and-leisure/recreation/other-recreation/horseback-riding
[6] http://www.moon.com/destinations/philadelphia/arts-and-leisure/recreation/other-recreation/ice-skating
[7] http://www.moon.com/destinations/philadelphia/arts-and-leisure/recreation/other-recreation/water-activities
[8] http://www.moon.com/destinations/philadelphia/arts-and-leisure/recreation/other-recreation/yoga-and-meditation