[collyw]

You are missing out if you don't go outside.

As someone that used to climb, gym climbing is very boring and repetitive compared to outdoor. There are loads of different types of rock for starters that require different styles of climbing. Indoor tends to be very strength oriented and less about problem solving / subtle balance. (I am sure there will be some people who have counter examples, but in general I think this is true).

Whitewater kayaking is even more fun though.