Boston based artist Janet Echelmen (previously featured here) has created one of her most dramatic works yet, but you won't find it in any gallery. Her latest aerial sculpture hangs half an acre above Boston's Rose Kennedy Fitzgerald Greenway. Titled "As If It Were Already Here", the piece weighs a whopping 2,000 lbs, made of 542,000 knots which Echelmen wove together into a colorful, graceful mesh. Take a look at more photos after the jump!