PROBLEM TO BE SOLVED: To soften and heal heart by reviving nature being lost with the recent high growth as a miniature nature using water tanks in a dwelling house. SOLUTION: The water tanks 2 are formed like a block such as a rectangular parallelopiped of transparent synthetic resin material, and by combination of the water tanks 2, a piece of furniture, interior, building parts and horticulture devices are constituted through a horiculture block body suitably planted with garden trees.
