The season for lounging en plein air may be coming to a close, but that doesn't mean you have to stop lusting after sumptuous private gardens. In fact, spending fall evenings cozied up in the secret garden-esque backyard of this Upper East Side townhouse seems pretty ideal. The yard measures an impressive 46-feet deep and features a zig-zagging brick pathway and ivy-covered walls. If that's not enough green space, the six-story townhouse also features a balcony off of the library and a rooftop terrace. There are five bedrooms, six wood-burning fireplaces, and a wine cellar. It's located at 239 East 78th Street between Second and Third avenues, and it's asking $6.65 million.