Here are a few creations I made using landscape block from Lowe's that I like to use. The blocks are what I made several walls and pedestals out of up by the house in a project before the pool.
Here is a seating wall that blocks off a 2'+ dropoff at the back of the raised deck.
Landscape block seating wall by
Snowman 10, on Flickr
And here is a multipurpose table that is really a way to hide and protect an electrical outlet sticking up out of the decking. Originally the outlet was to be where a post from the pavilion would be but we eliminated the two center posts in the design. On another thread people were talking about how to conceal/shield an electrical outlet and that got me thinking. It was really just like playing with Legos. I started placing them and rearranging them until something useful and not ugly came about. Wife gave the thumbs up so now I'll glue them down and together.
Landscape block electrical outlet table/chair by
Snowman 10, on Flickr