Go to a hobby or craft store and buy some plastic jewels. We used these for the eyes of the gargoyles. Blue, green, yellow and copper really set off these guys. At night when the patio lights are on you can see the gargoyles just glowing with the eyes lit up. It has a very pleasant aura about it.
Buy some concrete landscaping blocks and surround your deck area. Create a surround area around the deck that has style to it and start adding plants. Depending on your region, buy some butterfly bushes or any plants that adds color. Add mulch and all the flowers you want.
I went to a landscape store and purchased two Landscape Block Guys The store can drill a small hole through the rock so you can add water lines through them. If you have a pick-up truck they can load them for you. You may have to make a trip per rock. Once you arrive to your house get some help from friends and roll the boulder to your desired area of placement.
Dig an area under the front of the rock two to three feet down with the same diameter around the rock. Buy a water pond liner to insert in the dug out area. Place a five gallon bucket for the water trap. Purchase a small water pump at the landscape store to hook up to create the water fountain from the rock. Fill with landscaping rock. The store can give you the directions for this or search on the internet for more detailed information.