Always keep pond safety in mind.  Here is a helpful article,
http://www.rospa.com/leisuresafety/adviceandinformation/watersafety/pond-garden-watersafety.aspx

Have you ever considered adding a garden railway to your water garden?  Check out this video:

http://www.youtube.com/watch?v=cWDyCdh2cDQ

Did you know you could have a backyard pond in just six hours?  Read On....

http://www.thisoldhouse.com/toh/how-to/intro/0,,20205593,00.html

Don't throw away that old urn..turn it into a fountain!  This Old House tells us how..http://www.thisoldhouse.com/toh/how-to/intro/0,,20192998,00.html