When one sees a discarded water tank, images of miniature kids’ palaces don’t typically come to mind. But Katell Gelebart, a very clever, eco-minded designer saw the old water tanks being cleared during the construction of The Dune eco resort in Pondicherry, India, and decided they would make the perfect green playhouses for children visiting the resort. Painted with nature themes to camouflage them in the playground and featuring carved-out doors and windows and ornate miniature gazebos on their roofs, these recycled water tanks are a prime example of someone’s trash being someone else’s treasure.