Little Hidden Luxuries: Secret Outdoor Spaces in the City

One of the things I love most about living in New York is catching little glimpses of outdoor spaces -- somebody's patio or rooftop garden, little pockets of green within the city. Of course gardens are always lovely, but these city gardens seem especially precious because they are so rare, and especially verdant and inviting compared with the noise and bustle of the city. I've hunted down blah beautiful city outdoor spaces, so whether you live in New York or not, and whether you have an outdoor...