I know that most people who are dedicated climbers find places to live that suit their hobby, i.e. Boulder, Colorado, or Huecos, New Mexico. For those who do not live in an area with real rock available 24 hours a day, 7 days a week, 365 days a year, we must find ways to make do. I call this "Urban Climbing".
To be an "urban climber", one has to make the best out of the situation they have. For example, my friends and I obviously can't multipitch in Minneapolis, MN, so...we multipitch trees.

We make do with what we can. It's fun! Buildering is quite common when we're not at our local gym. We climb the false rocks at the zoo until we get yelled at. Until we move out on our own, urban climbing will keep us interested in the sport. Once we can start climbing tufas in Greece, I'm guessing we'll start to leave the trees alone.
Until next time.
Danny