Ponds are not too difficult to do, once you know your way around Vue - what part are you having trouble with?

Is it-

1. Forming the terrain into a pond shape?
2. Adding water?

The example shown is pretty basic - 2 mins and about half a dozen clicks.

Procedure-( for this example)

1. select standard terrain, 256x256 size - this creates a fractual mountain as a default.
2. select terrain, right click on it and select edit terrain,
3. select the Dig tool in the terrain editor and hollow out the middle.
4. select a suitable material for the terrain.
5. Add water - you can use a water plane, but in this example it would make your terrain appear like an island, so in this case select a cylinder from the primitives menu.
   6 Resize it to be a bit wider than the hole you dug for your pond, and then squash it down to the depth you want your water. Drop it on the terrain over your hole, and click on drop to ground.
   7.Apply a suitable water mat. Add a few plants
6. Voila - a basic pond.