Outdoor Patio Heaters Where Can I Find A Large Planter/ Outdoor Furniture Piece?

Where can I find a large planter/ outdoor furniture piece? - outdoor patio heaters

Seeking that which cover most of the large 4 'x 4' oven in my garden. I am looking for a big (I guess its called a planter) piece that the guy you see at the mall can be outdoors. What are their names and where they buy, how big?