Few are likely to stumble upon this hidden little gem of a park. Set behind Union Square Plaza and tucked beside the homes on Homer Square, this .12-acre green space is mostly out of view to passersby. But wander in and you'll find an oval of lush grass partially ringed by a pretty stone wall. A short pathway is dotted by cherry red benches and a drinking fountain. No dogs are allowed, but kicking back at this unexpected urban oasis certainly is.