Walking between these stone and concrete structures feels like you are exploring the ruins of an ancient civilization. Scattered between the trees are endless paths, nooks, and crannies to get lost in. In reality, however, the “overgrownness” of the structures is highly intentional, and part of its design. In the 1970s, artist Louis le Roy (1924-2012) obtained an empty piece of land and began building what is now known as the Ecokathedraal (”eco cathedral”) near the town of Mildam, Netherlands. He made an arrangement with the municipality that leftover bricks and…