Raised Garden Bed Ideas From Washington State

I found a post where this guy went to Washington State, and while there saw some raised bed gardening ideas from a restraunt.  The site has more detailed images.

Some good ideas were things like

• Drip irrigation
• 1x8 and 4x4 construction
• From the pictures it looks like the beds were about 21" high
• They used gravel around the beds
• Lastly there was a picture of pots that were partially in the ground.

 I'm thinking of doing some pots in the ground, and like the way they used plastic containers instead of expensive clay ones.