I'm going to buy a bus pass soon.  I'm kind of excited.  Whenever I have nothing better to do, I can just get on, and see where it takes me.  Then try to figure out my way back.  Last country I visited, I would sometimes do that.  Get on their little buses, hop off somewhere, walk around, then catch another one.  I would sometimes end up near the airport, or by the lake or a canal, or back to their central station.  That last stop wasn't very romantic.